nfs_vnops.c revision 1.168
1 /* $NetBSD: nfs_vnops.c,v 1.168 2003/05/21 13:50:55 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95 39 */ 40 41 /* 42 * vnode op calls for Sun NFS version 2 and 3 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: nfs_vnops.c,v 1.168 2003/05/21 13:50:55 yamt Exp $"); 47 48 #include "opt_nfs.h" 49 #include "opt_uvmhist.h" 50 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/kernel.h> 54 #include <sys/systm.h> 55 #include <sys/resourcevar.h> 56 #include <sys/proc.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/malloc.h> 60 #include <sys/mbuf.h> 61 #include <sys/namei.h> 62 #include <sys/vnode.h> 63 #include <sys/dirent.h> 64 #include <sys/fcntl.h> 65 #include <sys/hash.h> 66 #include <sys/lockf.h> 67 #include <sys/stat.h> 68 #include <sys/unistd.h> 69 70 #include <uvm/uvm_extern.h> 71 #include <uvm/uvm.h> 72 73 #include <miscfs/fifofs/fifo.h> 74 #include <miscfs/genfs/genfs.h> 75 #include <miscfs/specfs/specdev.h> 76 77 #include <nfs/rpcv2.h> 78 #include <nfs/nfsproto.h> 79 #include <nfs/nfs.h> 80 #include <nfs/nfsnode.h> 81 #include <nfs/nfsmount.h> 82 #include <nfs/xdr_subs.h> 83 #include <nfs/nfsm_subs.h> 84 #include <nfs/nqnfs.h> 85 #include <nfs/nfs_var.h> 86 87 #include <net/if.h> 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 91 /* 92 * Global vfs data structures for nfs 93 */ 94 int (**nfsv2_vnodeop_p) __P((void *)); 95 const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = { 96 { &vop_default_desc, vn_default_error }, 97 { &vop_lookup_desc, nfs_lookup }, /* lookup */ 98 { &vop_create_desc, nfs_create }, /* create */ 99 { &vop_mknod_desc, nfs_mknod }, /* mknod */ 100 { &vop_open_desc, nfs_open }, /* open */ 101 { &vop_close_desc, nfs_close }, /* close */ 102 { &vop_access_desc, nfs_access }, /* access */ 103 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 104 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 105 { &vop_read_desc, nfs_read }, /* read */ 106 { &vop_write_desc, nfs_write }, /* write */ 107 { &vop_lease_desc, nfs_lease_check }, /* lease */ 108 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 109 { &vop_ioctl_desc, nfs_ioctl }, /* ioctl */ 110 { &vop_poll_desc, nfs_poll }, /* poll */ 111 { &vop_kqfilter_desc, nfs_kqfilter }, /* kqfilter */ 112 { &vop_revoke_desc, nfs_revoke }, /* revoke */ 113 { &vop_mmap_desc, nfs_mmap }, /* mmap */ 114 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 115 { &vop_seek_desc, nfs_seek }, /* seek */ 116 { &vop_remove_desc, nfs_remove }, /* remove */ 117 { &vop_link_desc, nfs_link }, /* link */ 118 { &vop_rename_desc, nfs_rename }, /* rename */ 119 { &vop_mkdir_desc, nfs_mkdir }, /* mkdir */ 120 { &vop_rmdir_desc, nfs_rmdir }, /* rmdir */ 121 { &vop_symlink_desc, nfs_symlink }, /* symlink */ 122 { &vop_readdir_desc, nfs_readdir }, /* readdir */ 123 { &vop_readlink_desc, nfs_readlink }, /* readlink */ 124 { &vop_abortop_desc, nfs_abortop }, /* abortop */ 125 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 126 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 127 { &vop_lock_desc, nfs_lock }, /* lock */ 128 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 129 { &vop_bmap_desc, nfs_bmap }, /* bmap */ 130 { &vop_strategy_desc, nfs_strategy }, /* strategy */ 131 { &vop_print_desc, nfs_print }, /* print */ 132 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 133 { &vop_pathconf_desc, nfs_pathconf }, /* pathconf */ 134 { &vop_advlock_desc, nfs_advlock }, /* advlock */ 135 { &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */ 136 { &vop_valloc_desc, nfs_valloc }, /* valloc */ 137 { &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */ 138 { &vop_vfree_desc, nfs_vfree }, /* vfree */ 139 { &vop_truncate_desc, nfs_truncate }, /* truncate */ 140 { &vop_update_desc, nfs_update }, /* update */ 141 { &vop_bwrite_desc, nfs_bwrite }, /* bwrite */ 142 { &vop_getpages_desc, nfs_getpages }, /* getpages */ 143 { &vop_putpages_desc, genfs_putpages }, /* putpages */ 144 { NULL, NULL } 145 }; 146 const struct vnodeopv_desc nfsv2_vnodeop_opv_desc = 147 { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries }; 148 149 /* 150 * Special device vnode ops 151 */ 152 int (**spec_nfsv2nodeop_p) __P((void *)); 153 const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = { 154 { &vop_default_desc, vn_default_error }, 155 { &vop_lookup_desc, spec_lookup }, /* lookup */ 156 { &vop_create_desc, spec_create }, /* create */ 157 { &vop_mknod_desc, spec_mknod }, /* mknod */ 158 { &vop_open_desc, spec_open }, /* open */ 159 { &vop_close_desc, nfsspec_close }, /* close */ 160 { &vop_access_desc, nfsspec_access }, /* access */ 161 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 162 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 163 { &vop_read_desc, nfsspec_read }, /* read */ 164 { &vop_write_desc, nfsspec_write }, /* write */ 165 { &vop_lease_desc, spec_lease_check }, /* lease */ 166 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 167 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 168 { &vop_poll_desc, spec_poll }, /* poll */ 169 { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */ 170 { &vop_revoke_desc, spec_revoke }, /* revoke */ 171 { &vop_mmap_desc, spec_mmap }, /* mmap */ 172 { &vop_fsync_desc, spec_fsync }, /* fsync */ 173 { &vop_seek_desc, spec_seek }, /* seek */ 174 { &vop_remove_desc, spec_remove }, /* remove */ 175 { &vop_link_desc, spec_link }, /* link */ 176 { &vop_rename_desc, spec_rename }, /* rename */ 177 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 178 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 179 { &vop_symlink_desc, spec_symlink }, /* symlink */ 180 { &vop_readdir_desc, spec_readdir }, /* readdir */ 181 { &vop_readlink_desc, spec_readlink }, /* readlink */ 182 { &vop_abortop_desc, spec_abortop }, /* abortop */ 183 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 184 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 185 { &vop_lock_desc, nfs_lock }, /* lock */ 186 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 187 { &vop_bmap_desc, spec_bmap }, /* bmap */ 188 { &vop_strategy_desc, spec_strategy }, /* strategy */ 189 { &vop_print_desc, nfs_print }, /* print */ 190 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 191 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 192 { &vop_advlock_desc, spec_advlock }, /* advlock */ 193 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 194 { &vop_valloc_desc, spec_valloc }, /* valloc */ 195 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 196 { &vop_vfree_desc, spec_vfree }, /* vfree */ 197 { &vop_truncate_desc, spec_truncate }, /* truncate */ 198 { &vop_update_desc, nfs_update }, /* update */ 199 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 200 { &vop_getpages_desc, spec_getpages }, /* getpages */ 201 { &vop_putpages_desc, spec_putpages }, /* putpages */ 202 { NULL, NULL } 203 }; 204 const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc = 205 { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries }; 206 207 int (**fifo_nfsv2nodeop_p) __P((void *)); 208 const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = { 209 { &vop_default_desc, vn_default_error }, 210 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 211 { &vop_create_desc, fifo_create }, /* create */ 212 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 213 { &vop_open_desc, fifo_open }, /* open */ 214 { &vop_close_desc, nfsfifo_close }, /* close */ 215 { &vop_access_desc, nfsspec_access }, /* access */ 216 { &vop_getattr_desc, nfs_getattr }, /* getattr */ 217 { &vop_setattr_desc, nfs_setattr }, /* setattr */ 218 { &vop_read_desc, nfsfifo_read }, /* read */ 219 { &vop_write_desc, nfsfifo_write }, /* write */ 220 { &vop_lease_desc, fifo_lease_check }, /* lease */ 221 { &vop_fcntl_desc, genfs_fcntl }, /* fcntl */ 222 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 223 { &vop_poll_desc, fifo_poll }, /* poll */ 224 { &vop_kqfilter_desc, fifo_kqfilter }, /* kqfilter */ 225 { &vop_revoke_desc, fifo_revoke }, /* revoke */ 226 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 227 { &vop_fsync_desc, nfs_fsync }, /* fsync */ 228 { &vop_seek_desc, fifo_seek }, /* seek */ 229 { &vop_remove_desc, fifo_remove }, /* remove */ 230 { &vop_link_desc, fifo_link }, /* link */ 231 { &vop_rename_desc, fifo_rename }, /* rename */ 232 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 233 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 234 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 235 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 236 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 237 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 238 { &vop_inactive_desc, nfs_inactive }, /* inactive */ 239 { &vop_reclaim_desc, nfs_reclaim }, /* reclaim */ 240 { &vop_lock_desc, nfs_lock }, /* lock */ 241 { &vop_unlock_desc, nfs_unlock }, /* unlock */ 242 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 243 { &vop_strategy_desc, genfs_badop }, /* strategy */ 244 { &vop_print_desc, nfs_print }, /* print */ 245 { &vop_islocked_desc, nfs_islocked }, /* islocked */ 246 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 247 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 248 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 249 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 250 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 251 { &vop_vfree_desc, fifo_vfree }, /* vfree */ 252 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 253 { &vop_update_desc, nfs_update }, /* update */ 254 { &vop_bwrite_desc, vn_bwrite }, /* bwrite */ 255 { &vop_putpages_desc, fifo_putpages }, /* putpages */ 256 { NULL, NULL } 257 }; 258 const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc = 259 { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries }; 260 261 static void nfs_noop(struct mbuf *, caddr_t, size_t, void *); 262 263 /* 264 * Global variables 265 */ 266 extern u_int32_t nfs_true, nfs_false; 267 extern u_int32_t nfs_xdrneg1; 268 extern const nfstype nfsv3_type[9]; 269 270 int nfs_numasync = 0; 271 #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1)) 272 273 /* 274 * nfs null call from vfs. 275 */ 276 int 277 nfs_null(vp, cred, procp) 278 struct vnode *vp; 279 struct ucred *cred; 280 struct proc *procp; 281 { 282 caddr_t bpos, dpos; 283 int error = 0; 284 struct mbuf *mreq, *mrep, *md, *mb; 285 struct nfsnode *np = VTONFS(vp); 286 287 nfsm_reqhead(np, NFSPROC_NULL, 0); 288 nfsm_request(np, NFSPROC_NULL, procp, cred); 289 nfsm_reqdone; 290 return (error); 291 } 292 293 /* 294 * nfs access vnode op. 295 * For nfs version 2, just return ok. File accesses may fail later. 296 * For nfs version 3, use the access rpc to check accessibility. If file modes 297 * are changed on the server, accesses might still fail later. 298 */ 299 int 300 nfs_access(v) 301 void *v; 302 { 303 struct vop_access_args /* { 304 struct vnode *a_vp; 305 int a_mode; 306 struct ucred *a_cred; 307 struct proc *a_p; 308 } */ *ap = v; 309 struct vnode *vp = ap->a_vp; 310 u_int32_t *tl; 311 caddr_t cp; 312 int32_t t1, t2; 313 caddr_t bpos, dpos, cp2; 314 int error = 0, attrflag, cachevalid; 315 struct mbuf *mreq, *mrep, *md, *mb; 316 u_int32_t mode, rmode; 317 const int v3 = NFS_ISV3(vp); 318 struct nfsnode *np = VTONFS(vp); 319 320 cachevalid = (np->n_accstamp != -1 && 321 (time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) && 322 np->n_accuid == ap->a_cred->cr_uid); 323 324 /* 325 * Check access cache first. If this request has been made for this 326 * uid shortly before, use the cached result. 327 */ 328 if (cachevalid) { 329 if (!np->n_accerror) { 330 if ((np->n_accmode & ap->a_mode) == ap->a_mode) 331 return np->n_accerror; 332 } else if ((np->n_accmode & ap->a_mode) == np->n_accmode) 333 return np->n_accerror; 334 } 335 336 /* 337 * For nfs v3, do an access rpc, otherwise you are stuck emulating 338 * ufs_access() locally using the vattr. This may not be correct, 339 * since the server may apply other access criteria such as 340 * client uid-->server uid mapping that we do not know about, but 341 * this is better than just returning anything that is lying about 342 * in the cache. 343 */ 344 if (v3) { 345 nfsstats.rpccnt[NFSPROC_ACCESS]++; 346 nfsm_reqhead(np, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED); 347 nfsm_fhtom(np, v3); 348 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 349 if (ap->a_mode & VREAD) 350 mode = NFSV3ACCESS_READ; 351 else 352 mode = 0; 353 if (vp->v_type != VDIR) { 354 if (ap->a_mode & VWRITE) 355 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); 356 if (ap->a_mode & VEXEC) 357 mode |= NFSV3ACCESS_EXECUTE; 358 } else { 359 if (ap->a_mode & VWRITE) 360 mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | 361 NFSV3ACCESS_DELETE); 362 if (ap->a_mode & VEXEC) 363 mode |= NFSV3ACCESS_LOOKUP; 364 } 365 *tl = txdr_unsigned(mode); 366 nfsm_request(np, NFSPROC_ACCESS, ap->a_p, ap->a_cred); 367 nfsm_postop_attr(vp, attrflag, 0); 368 if (!error) { 369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 370 rmode = fxdr_unsigned(u_int32_t, *tl); 371 /* 372 * The NFS V3 spec does not clarify whether or not 373 * the returned access bits can be a superset of 374 * the ones requested, so... 375 */ 376 if ((rmode & mode) != mode) 377 error = EACCES; 378 } 379 nfsm_reqdone; 380 } else 381 return (nfsspec_access(ap)); 382 /* 383 * Disallow write attempts on filesystems mounted read-only; 384 * unless the file is a socket, fifo, or a block or character 385 * device resident on the filesystem. 386 */ 387 if (!error && (ap->a_mode & VWRITE) && 388 (vp->v_mount->mnt_flag & MNT_RDONLY)) { 389 switch (vp->v_type) { 390 case VREG: 391 case VDIR: 392 case VLNK: 393 error = EROFS; 394 default: 395 break; 396 } 397 } 398 399 if (!error || error == EACCES) { 400 /* 401 * If we got the same result as for a previous, 402 * different request, OR it in. Don't update 403 * the timestamp in that case. 404 */ 405 if (cachevalid && np->n_accstamp != -1 && 406 error == np->n_accerror) { 407 if (!error) 408 np->n_accmode |= ap->a_mode; 409 else if ((np->n_accmode & ap->a_mode) == ap->a_mode) 410 np->n_accmode = ap->a_mode; 411 } else { 412 np->n_accstamp = time.tv_sec; 413 np->n_accuid = ap->a_cred->cr_uid; 414 np->n_accmode = ap->a_mode; 415 np->n_accerror = error; 416 } 417 } 418 419 return (error); 420 } 421 422 /* 423 * nfs open vnode op 424 * Check to see if the type is ok 425 * and that deletion is not in progress. 426 * For paged in text files, you will need to flush the page cache 427 * if consistency is lost. 428 */ 429 /* ARGSUSED */ 430 int 431 nfs_open(v) 432 void *v; 433 { 434 struct vop_open_args /* { 435 struct vnode *a_vp; 436 int a_mode; 437 struct ucred *a_cred; 438 struct proc *a_p; 439 } */ *ap = v; 440 struct vnode *vp = ap->a_vp; 441 struct nfsnode *np = VTONFS(vp); 442 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 443 struct vattr vattr; 444 int error; 445 446 if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { 447 return (EACCES); 448 } 449 450 /* 451 * Initialize read and write creds here, for swapfiles 452 * and other paths that don't set the creds themselves. 453 */ 454 455 if (ap->a_mode & FREAD) { 456 if (np->n_rcred) { 457 crfree(np->n_rcred); 458 } 459 np->n_rcred = ap->a_cred; 460 crhold(np->n_rcred); 461 } 462 if (ap->a_mode & FWRITE) { 463 if (np->n_wcred) { 464 crfree(np->n_wcred); 465 } 466 np->n_wcred = ap->a_cred; 467 crhold(np->n_wcred); 468 } 469 470 #ifndef NFS_V2_ONLY 471 /* 472 * Get a valid lease. If cached data is stale, flush it. 473 */ 474 if (nmp->nm_flag & NFSMNT_NQNFS) { 475 if (NQNFS_CKINVALID(vp, np, ND_READ)) { 476 do { 477 error = nqnfs_getlease(vp, ND_READ, ap->a_cred, 478 ap->a_p); 479 } while (error == NQNFS_EXPIRED); 480 if (error) 481 return (error); 482 if (np->n_lrev != np->n_brev || 483 (np->n_flag & NQNFSNONCACHE)) { 484 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 485 ap->a_p, 1)) == EINTR) 486 return (error); 487 np->n_brev = np->n_lrev; 488 } 489 } 490 } else 491 #endif 492 { 493 if (np->n_flag & NMODIFIED) { 494 if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 495 ap->a_p, 1)) == EINTR) 496 return (error); 497 np->n_attrstamp = 0; 498 if (vp->v_type == VDIR) { 499 nfs_invaldircache(vp, 0); 500 np->n_direofoffset = 0; 501 } 502 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 503 if (error) 504 return (error); 505 np->n_mtime = vattr.va_mtime.tv_sec; 506 } else { 507 error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p); 508 if (error) 509 return (error); 510 if (np->n_mtime != vattr.va_mtime.tv_sec) { 511 if (vp->v_type == VDIR) { 512 nfs_invaldircache(vp, 0); 513 np->n_direofoffset = 0; 514 } 515 if ((error = nfs_vinvalbuf(vp, V_SAVE, 516 ap->a_cred, ap->a_p, 1)) == EINTR) 517 return (error); 518 np->n_mtime = vattr.va_mtime.tv_sec; 519 } 520 } 521 } 522 if ((nmp->nm_flag & NFSMNT_NQNFS) == 0) 523 np->n_attrstamp = 0; /* For Open/Close consistency */ 524 return (0); 525 } 526 527 /* 528 * nfs close vnode op 529 * What an NFS client should do upon close after writing is a debatable issue. 530 * Most NFS clients push delayed writes to the server upon close, basically for 531 * two reasons: 532 * 1 - So that any write errors may be reported back to the client process 533 * doing the close system call. By far the two most likely errors are 534 * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. 535 * 2 - To put a worst case upper bound on cache inconsistency between 536 * multiple clients for the file. 537 * There is also a consistency problem for Version 2 of the protocol w.r.t. 538 * not being able to tell if other clients are writing a file concurrently, 539 * since there is no way of knowing if the changed modify time in the reply 540 * is only due to the write for this client. 541 * (NFS Version 3 provides weak cache consistency data in the reply that 542 * should be sufficient to detect and handle this case.) 543 * 544 * The current code does the following: 545 * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers 546 * for NFS Version 3 - flush dirty buffers to the server but don't invalidate 547 * or commit them (this satisfies 1 and 2 except for the 548 * case where the server crashes after this close but 549 * before the commit RPC, which is felt to be "good 550 * enough". Changing the last argument to nfs_flush() to 551 * a 1 would force a commit operation, if it is felt a 552 * commit is necessary now. 553 * for NQNFS - do nothing now, since 2 is dealt with via leases and 554 * 1 should be dealt with via an fsync() system call for 555 * cases where write errors are important. 556 */ 557 /* ARGSUSED */ 558 int 559 nfs_close(v) 560 void *v; 561 { 562 struct vop_close_args /* { 563 struct vnodeop_desc *a_desc; 564 struct vnode *a_vp; 565 int a_fflag; 566 struct ucred *a_cred; 567 struct proc *a_p; 568 } */ *ap = v; 569 struct vnode *vp = ap->a_vp; 570 struct nfsnode *np = VTONFS(vp); 571 int error = 0; 572 UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist); 573 574 if (vp->v_type == VREG) { 575 if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 && 576 (np->n_flag & NMODIFIED)) { 577 if (NFS_ISV3(vp)) { 578 error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0); 579 np->n_flag &= ~NMODIFIED; 580 } else 581 error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1); 582 np->n_attrstamp = 0; 583 } 584 if (np->n_flag & NWRITEERR) { 585 np->n_flag &= ~NWRITEERR; 586 error = np->n_error; 587 } 588 } 589 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 590 return (error); 591 } 592 593 /* 594 * nfs getattr call from vfs. 595 */ 596 int 597 nfs_getattr(v) 598 void *v; 599 { 600 struct vop_getattr_args /* { 601 struct vnode *a_vp; 602 struct vattr *a_vap; 603 struct ucred *a_cred; 604 struct proc *a_p; 605 } */ *ap = v; 606 struct vnode *vp = ap->a_vp; 607 struct nfsnode *np = VTONFS(vp); 608 caddr_t cp; 609 u_int32_t *tl; 610 int32_t t1, t2; 611 caddr_t bpos, dpos; 612 int error = 0; 613 struct mbuf *mreq, *mrep, *md, *mb; 614 const int v3 = NFS_ISV3(vp); 615 616 /* 617 * Update local times for special files. 618 */ 619 if (np->n_flag & (NACC | NUPD)) 620 np->n_flag |= NCHG; 621 /* 622 * First look in the cache. 623 */ 624 if (nfs_getattrcache(vp, ap->a_vap) == 0) 625 return (0); 626 nfsstats.rpccnt[NFSPROC_GETATTR]++; 627 nfsm_reqhead(np, NFSPROC_GETATTR, NFSX_FH(v3)); 628 nfsm_fhtom(np, v3); 629 nfsm_request(np, NFSPROC_GETATTR, ap->a_p, ap->a_cred); 630 if (!error) { 631 nfsm_loadattr(vp, ap->a_vap, 0); 632 if (vp->v_type == VDIR && 633 ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ) 634 ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ; 635 } 636 nfsm_reqdone; 637 return (error); 638 } 639 640 /* 641 * nfs setattr call. 642 */ 643 int 644 nfs_setattr(v) 645 void *v; 646 { 647 struct vop_setattr_args /* { 648 struct vnodeop_desc *a_desc; 649 struct vnode *a_vp; 650 struct vattr *a_vap; 651 struct ucred *a_cred; 652 struct proc *a_p; 653 } */ *ap = v; 654 struct vnode *vp = ap->a_vp; 655 struct nfsnode *np = VTONFS(vp); 656 struct vattr *vap = ap->a_vap; 657 int error = 0; 658 u_quad_t tsize = 0; 659 660 /* 661 * Setting of flags is not supported. 662 */ 663 if (vap->va_flags != VNOVAL) 664 return (EOPNOTSUPP); 665 666 /* 667 * Disallow write attempts if the filesystem is mounted read-only. 668 */ 669 if ((vap->va_uid != (uid_t)VNOVAL || 670 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || 671 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && 672 (vp->v_mount->mnt_flag & MNT_RDONLY)) 673 return (EROFS); 674 if (vap->va_size != VNOVAL) { 675 switch (vp->v_type) { 676 case VDIR: 677 return (EISDIR); 678 case VCHR: 679 case VBLK: 680 case VSOCK: 681 case VFIFO: 682 if (vap->va_mtime.tv_sec == VNOVAL && 683 vap->va_atime.tv_sec == VNOVAL && 684 vap->va_mode == (mode_t)VNOVAL && 685 vap->va_uid == (uid_t)VNOVAL && 686 vap->va_gid == (gid_t)VNOVAL) 687 return (0); 688 vap->va_size = VNOVAL; 689 break; 690 default: 691 /* 692 * Disallow write attempts if the filesystem is 693 * mounted read-only. 694 */ 695 if (vp->v_mount->mnt_flag & MNT_RDONLY) 696 return (EROFS); 697 uvm_vnp_setsize(vp, vap->va_size); 698 tsize = np->n_size; 699 np->n_size = vap->va_size; 700 if (vap->va_size == 0) 701 error = nfs_vinvalbuf(vp, 0, 702 ap->a_cred, ap->a_p, 1); 703 else 704 error = nfs_vinvalbuf(vp, V_SAVE, 705 ap->a_cred, ap->a_p, 1); 706 if (error) { 707 uvm_vnp_setsize(vp, tsize); 708 return (error); 709 } 710 np->n_vattr->va_size = vap->va_size; 711 } 712 } else if ((vap->va_mtime.tv_sec != VNOVAL || 713 vap->va_atime.tv_sec != VNOVAL) && 714 vp->v_type == VREG && 715 (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, 716 ap->a_p, 1)) == EINTR) 717 return (error); 718 error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p); 719 if (error && vap->va_size != VNOVAL) { 720 np->n_size = np->n_vattr->va_size = tsize; 721 uvm_vnp_setsize(vp, np->n_size); 722 } 723 VN_KNOTE(vp, NOTE_ATTRIB); 724 return (error); 725 } 726 727 /* 728 * Do an nfs setattr rpc. 729 */ 730 int 731 nfs_setattrrpc(vp, vap, cred, procp) 732 struct vnode *vp; 733 struct vattr *vap; 734 struct ucred *cred; 735 struct proc *procp; 736 { 737 struct nfsv2_sattr *sp; 738 caddr_t cp; 739 int32_t t1, t2; 740 caddr_t bpos, dpos, cp2; 741 u_int32_t *tl; 742 int error = 0, wccflag = NFSV3_WCCRATTR; 743 struct mbuf *mreq, *mrep, *md, *mb; 744 const int v3 = NFS_ISV3(vp); 745 struct nfsnode *np = VTONFS(vp); 746 747 nfsstats.rpccnt[NFSPROC_SETATTR]++; 748 nfsm_reqhead(np, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3)); 749 nfsm_fhtom(np, v3); 750 if (v3) { 751 nfsm_v3attrbuild(vap, TRUE); 752 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 753 *tl = nfs_false; 754 } else { 755 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 756 if (vap->va_mode == (mode_t)VNOVAL) 757 sp->sa_mode = nfs_xdrneg1; 758 else 759 sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); 760 if (vap->va_uid == (uid_t)VNOVAL) 761 sp->sa_uid = nfs_xdrneg1; 762 else 763 sp->sa_uid = txdr_unsigned(vap->va_uid); 764 if (vap->va_gid == (gid_t)VNOVAL) 765 sp->sa_gid = nfs_xdrneg1; 766 else 767 sp->sa_gid = txdr_unsigned(vap->va_gid); 768 sp->sa_size = txdr_unsigned(vap->va_size); 769 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 770 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 771 } 772 nfsm_request(np, NFSPROC_SETATTR, procp, cred); 773 if (v3) { 774 nfsm_wcc_data(vp, wccflag, 0); 775 } else 776 nfsm_loadattr(vp, (struct vattr *)0, 0); 777 nfsm_reqdone; 778 return (error); 779 } 780 781 /* 782 * nfs lookup call, one step at a time... 783 * First look in cache 784 * If not found, unlock the directory nfsnode and do the rpc 785 * 786 * This code is full of lock/unlock statements and checks, because 787 * we continue after cache_lookup has finished (we need to check 788 * with the attr cache and do an rpc if it has timed out). This means 789 * that the locking effects of cache_lookup have to be taken into 790 * account. 791 */ 792 int 793 nfs_lookup(v) 794 void *v; 795 { 796 struct vop_lookup_args /* { 797 struct vnodeop_desc *a_desc; 798 struct vnode *a_dvp; 799 struct vnode **a_vpp; 800 struct componentname *a_cnp; 801 } */ *ap = v; 802 struct componentname *cnp = ap->a_cnp; 803 struct vnode *dvp = ap->a_dvp; 804 struct vnode **vpp = ap->a_vpp; 805 int flags; 806 struct vnode *newvp; 807 u_int32_t *tl; 808 caddr_t cp; 809 int32_t t1, t2; 810 caddr_t bpos, dpos, cp2; 811 struct mbuf *mreq, *mrep, *md, *mb; 812 long len; 813 nfsfh_t *fhp; 814 struct nfsnode *np; 815 int lockparent, wantparent, error = 0, attrflag, fhsize; 816 const int v3 = NFS_ISV3(dvp); 817 818 cnp->cn_flags &= ~PDIRUNLOCK; 819 flags = cnp->cn_flags; 820 821 *vpp = NULLVP; 822 newvp = NULLVP; 823 if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) && 824 (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) 825 return (EROFS); 826 if (dvp->v_type != VDIR) 827 return (ENOTDIR); 828 829 lockparent = flags & LOCKPARENT; 830 wantparent = flags & (LOCKPARENT|WANTPARENT); 831 np = VTONFS(dvp); 832 833 /* 834 * Before tediously performing a linear scan of the directory, 835 * check the name cache to see if the directory/name pair 836 * we are looking for is known already. 837 * If the directory/name pair is found in the name cache, 838 * we have to ensure the directory has not changed from 839 * the time the cache entry has been created. If it has, 840 * the cache entry has to be ignored. 841 */ 842 if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) { 843 struct vattr vattr; 844 int err2; 845 846 if (error && error != ENOENT) { 847 *vpp = NULLVP; 848 return error; 849 } 850 851 if (cnp->cn_flags & PDIRUNLOCK) { 852 err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); 853 if (err2 != 0) { 854 *vpp = NULLVP; 855 return err2; 856 } 857 cnp->cn_flags &= ~PDIRUNLOCK; 858 } 859 860 err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc); 861 if (err2 != 0) { 862 if (error == 0) { 863 if (*vpp != dvp) 864 vput(*vpp); 865 else 866 vrele(*vpp); 867 } 868 *vpp = NULLVP; 869 return err2; 870 } 871 872 if (error == ENOENT) { 873 if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred, 874 cnp->cn_proc) && vattr.va_mtime.tv_sec == 875 VTONFS(dvp)->n_nctime) 876 return ENOENT; 877 cache_purge(dvp); 878 np->n_nctime = 0; 879 goto dorpc; 880 } 881 882 newvp = *vpp; 883 if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc) 884 && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) 885 { 886 nfsstats.lookupcache_hits++; 887 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 888 cnp->cn_flags |= SAVENAME; 889 if ((!lockparent || !(flags & ISLASTCN)) && 890 newvp != dvp) 891 VOP_UNLOCK(dvp, 0); 892 return (0); 893 } 894 cache_purge(newvp); 895 if (newvp != dvp) 896 vput(newvp); 897 else 898 vrele(newvp); 899 *vpp = NULLVP; 900 } 901 dorpc: 902 error = 0; 903 newvp = NULLVP; 904 nfsstats.lookupcache_misses++; 905 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 906 len = cnp->cn_namelen; 907 nfsm_reqhead(np, NFSPROC_LOOKUP, 908 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 909 nfsm_fhtom(np, v3); 910 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 911 nfsm_request(np, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred); 912 if (error) { 913 nfsm_postop_attr(dvp, attrflag, 0); 914 m_freem(mrep); 915 goto nfsmout; 916 } 917 nfsm_getfh(fhp, fhsize, v3); 918 919 /* 920 * Handle RENAME case... 921 */ 922 if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) { 923 if (NFS_CMPFH(np, fhp, fhsize)) { 924 m_freem(mrep); 925 return (EISDIR); 926 } 927 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 928 if (error) { 929 m_freem(mrep); 930 return error; 931 } 932 newvp = NFSTOV(np); 933 if (v3) { 934 nfsm_postop_attr(newvp, attrflag, 0); 935 nfsm_postop_attr(dvp, attrflag, 0); 936 } else 937 nfsm_loadattr(newvp, (struct vattr *)0, 0); 938 *vpp = newvp; 939 m_freem(mrep); 940 cnp->cn_flags |= SAVENAME; 941 if (!lockparent) { 942 VOP_UNLOCK(dvp, 0); 943 cnp->cn_flags |= PDIRUNLOCK; 944 } 945 return (0); 946 } 947 948 /* 949 * The postop attr handling is duplicated for each if case, 950 * because it should be done while dvp is locked (unlocking 951 * dvp is different for each case). 952 */ 953 954 if (NFS_CMPFH(np, fhp, fhsize)) { 955 /* 956 * "." lookup 957 */ 958 VREF(dvp); 959 newvp = dvp; 960 if (v3) { 961 nfsm_postop_attr(newvp, attrflag, 0); 962 nfsm_postop_attr(dvp, attrflag, 0); 963 } else 964 nfsm_loadattr(newvp, (struct vattr *)0, 0); 965 } else if (flags & ISDOTDOT) { 966 /* 967 * ".." lookup 968 */ 969 VOP_UNLOCK(dvp, 0); 970 cnp->cn_flags |= PDIRUNLOCK; 971 972 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 973 if (error) { 974 if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0) 975 cnp->cn_flags &= ~PDIRUNLOCK; 976 m_freem(mrep); 977 return error; 978 } 979 newvp = NFSTOV(np); 980 981 if (v3) { 982 nfsm_postop_attr(newvp, attrflag, 0); 983 nfsm_postop_attr(dvp, attrflag, 0); 984 } else 985 nfsm_loadattr(newvp, (struct vattr *)0, 0); 986 987 if (lockparent && (flags & ISLASTCN)) { 988 if ((error = vn_lock(dvp, LK_EXCLUSIVE))) { 989 m_freem(mrep); 990 vput(newvp); 991 return error; 992 } 993 cnp->cn_flags &= ~PDIRUNLOCK; 994 } 995 } else { 996 /* 997 * Other lookups. 998 */ 999 error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); 1000 if (error) { 1001 m_freem(mrep); 1002 return error; 1003 } 1004 newvp = NFSTOV(np); 1005 if (v3) { 1006 nfsm_postop_attr(newvp, attrflag, 0); 1007 nfsm_postop_attr(dvp, attrflag, 0); 1008 } else 1009 nfsm_loadattr(newvp, (struct vattr *)0, 0); 1010 if (!lockparent || !(flags & ISLASTCN)) { 1011 VOP_UNLOCK(dvp, 0); 1012 cnp->cn_flags |= PDIRUNLOCK; 1013 } 1014 } 1015 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1016 cnp->cn_flags |= SAVENAME; 1017 if ((cnp->cn_flags & MAKEENTRY) && 1018 (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) { 1019 np->n_ctime = np->n_vattr->va_ctime.tv_sec; 1020 cache_enter(dvp, newvp, cnp); 1021 } 1022 *vpp = newvp; 1023 nfsm_reqdone; 1024 if (error) { 1025 /* 1026 * We get here only because of errors returned by 1027 * the RPC. Otherwise we'll have returned above 1028 * (the nfsm_* macros will jump to nfsm_reqdone 1029 * on error). 1030 */ 1031 if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) && 1032 cnp->cn_nameiop != CREATE) { 1033 if (VTONFS(dvp)->n_nctime == 0) 1034 VTONFS(dvp)->n_nctime = 1035 VTONFS(dvp)->n_vattr->va_mtime.tv_sec; 1036 cache_enter(dvp, NULL, cnp); 1037 } 1038 if (newvp != NULLVP) { 1039 vrele(newvp); 1040 if (newvp != dvp) 1041 VOP_UNLOCK(newvp, 0); 1042 } 1043 if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) && 1044 (flags & ISLASTCN) && error == ENOENT) { 1045 if (dvp->v_mount->mnt_flag & MNT_RDONLY) 1046 error = EROFS; 1047 else 1048 error = EJUSTRETURN; 1049 } 1050 if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN)) 1051 cnp->cn_flags |= SAVENAME; 1052 *vpp = NULL; 1053 } 1054 1055 return error; 1056 } 1057 1058 /* 1059 * nfs read call. 1060 * Just call nfs_bioread() to do the work. 1061 */ 1062 int 1063 nfs_read(v) 1064 void *v; 1065 { 1066 struct vop_read_args /* { 1067 struct vnode *a_vp; 1068 struct uio *a_uio; 1069 int a_ioflag; 1070 struct ucred *a_cred; 1071 } */ *ap = v; 1072 struct vnode *vp = ap->a_vp; 1073 1074 if (vp->v_type != VREG) 1075 return (EPERM); 1076 return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0)); 1077 } 1078 1079 /* 1080 * nfs readlink call 1081 */ 1082 int 1083 nfs_readlink(v) 1084 void *v; 1085 { 1086 struct vop_readlink_args /* { 1087 struct vnode *a_vp; 1088 struct uio *a_uio; 1089 struct ucred *a_cred; 1090 } */ *ap = v; 1091 struct vnode *vp = ap->a_vp; 1092 1093 if (vp->v_type != VLNK) 1094 return (EPERM); 1095 return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0)); 1096 } 1097 1098 /* 1099 * Do a readlink rpc. 1100 * Called by nfs_doio() from below the buffer cache. 1101 */ 1102 int 1103 nfs_readlinkrpc(vp, uiop, cred) 1104 struct vnode *vp; 1105 struct uio *uiop; 1106 struct ucred *cred; 1107 { 1108 u_int32_t *tl; 1109 caddr_t cp; 1110 int32_t t1, t2; 1111 caddr_t bpos, dpos, cp2; 1112 int error = 0, len, attrflag; 1113 struct mbuf *mreq, *mrep, *md, *mb; 1114 const int v3 = NFS_ISV3(vp); 1115 struct nfsnode *np = VTONFS(vp); 1116 1117 nfsstats.rpccnt[NFSPROC_READLINK]++; 1118 nfsm_reqhead(np, NFSPROC_READLINK, NFSX_FH(v3)); 1119 nfsm_fhtom(np, v3); 1120 nfsm_request(np, NFSPROC_READLINK, uiop->uio_procp, cred); 1121 if (v3) 1122 nfsm_postop_attr(vp, attrflag, 0); 1123 if (!error) { 1124 nfsm_strsiz(len, NFS_MAXPATHLEN); 1125 nfsm_mtouio(uiop, len); 1126 } 1127 nfsm_reqdone; 1128 return (error); 1129 } 1130 1131 /* 1132 * nfs read rpc call 1133 * Ditto above 1134 */ 1135 int 1136 nfs_readrpc(vp, uiop) 1137 struct vnode *vp; 1138 struct uio *uiop; 1139 { 1140 u_int32_t *tl; 1141 caddr_t cp; 1142 int32_t t1, t2; 1143 caddr_t bpos, dpos, cp2; 1144 struct mbuf *mreq, *mrep, *md, *mb; 1145 struct nfsmount *nmp; 1146 int error = 0, len, retlen, tsiz, eof, attrflag; 1147 const int v3 = NFS_ISV3(vp); 1148 struct nfsnode *np = VTONFS(vp); 1149 1150 #ifndef nolint 1151 eof = 0; 1152 #endif 1153 nmp = VFSTONFS(vp->v_mount); 1154 tsiz = uiop->uio_resid; 1155 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1156 return (EFBIG); 1157 while (tsiz > 0) { 1158 nfsstats.rpccnt[NFSPROC_READ]++; 1159 len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; 1160 nfsm_reqhead(np, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3); 1161 nfsm_fhtom(np, v3); 1162 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3); 1163 if (v3) { 1164 txdr_hyper(uiop->uio_offset, tl); 1165 *(tl + 2) = txdr_unsigned(len); 1166 } else { 1167 *tl++ = txdr_unsigned(uiop->uio_offset); 1168 *tl++ = txdr_unsigned(len); 1169 *tl = 0; 1170 } 1171 nfsm_request(np, NFSPROC_READ, uiop->uio_procp, 1172 VTONFS(vp)->n_rcred); 1173 if (v3) { 1174 nfsm_postop_attr(vp, attrflag, NAC_NOTRUNC); 1175 if (error) { 1176 m_freem(mrep); 1177 goto nfsmout; 1178 } 1179 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1180 eof = fxdr_unsigned(int, *(tl + 1)); 1181 } else 1182 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1183 nfsm_strsiz(retlen, nmp->nm_rsize); 1184 nfsm_mtouio(uiop, retlen); 1185 m_freem(mrep); 1186 tsiz -= retlen; 1187 if (v3) { 1188 if (eof || retlen == 0) 1189 tsiz = 0; 1190 } else if (retlen < len) 1191 tsiz = 0; 1192 } 1193 nfsmout: 1194 return (error); 1195 } 1196 1197 /* 1198 * dummy callback for mbuf. 1199 */ 1200 static void 1201 nfs_noop(struct mbuf *m, caddr_t buf, size_t size, void *arg) 1202 { 1203 } 1204 1205 /* 1206 * nfs write call 1207 */ 1208 int 1209 nfs_writerpc(vp, uiop, iomode, pageprotected, stalewriteverf) 1210 struct vnode *vp; 1211 struct uio *uiop; 1212 int *iomode; 1213 boolean_t pageprotected; 1214 boolean_t *stalewriteverf; 1215 { 1216 u_int32_t *tl; 1217 caddr_t cp; 1218 int32_t t1, t2, backup; 1219 caddr_t bpos, dpos, cp2; 1220 struct mbuf *mreq, *mrep, *md, *mb; 1221 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1222 int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; 1223 const int v3 = NFS_ISV3(vp); 1224 int committed = NFSV3WRITE_FILESYNC; 1225 struct nfsnode *np = VTONFS(vp); 1226 1227 if (vp->v_mount->mnt_flag & MNT_RDONLY) { 1228 panic("writerpc readonly vp %p", vp); 1229 } 1230 1231 #ifdef DIAGNOSTIC 1232 if (uiop->uio_iovcnt != 1) 1233 panic("nfs: writerpc iovcnt > 1"); 1234 #endif 1235 tsiz = uiop->uio_resid; 1236 if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) 1237 return (EFBIG); 1238 while (tsiz > 0) { 1239 int datalen; 1240 1241 nfsstats.rpccnt[NFSPROC_WRITE]++; 1242 len = min(tsiz, nmp->nm_wsize); 1243 datalen = pageprotected ? 0 : nfsm_rndup(len); 1244 nfsm_reqhead(np, NFSPROC_WRITE, 1245 NFSX_FH(v3) + 5 * NFSX_UNSIGNED + datalen); 1246 nfsm_fhtom(np, v3); 1247 if (v3) { 1248 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 1249 txdr_hyper(uiop->uio_offset, tl); 1250 tl += 2; 1251 *tl++ = txdr_unsigned(len); 1252 *tl++ = txdr_unsigned(*iomode); 1253 *tl = txdr_unsigned(len); 1254 } else { 1255 u_int32_t x; 1256 1257 nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED); 1258 /* Set both "begin" and "current" to non-garbage. */ 1259 x = txdr_unsigned((u_int32_t)uiop->uio_offset); 1260 *tl++ = x; /* "begin offset" */ 1261 *tl++ = x; /* "current offset" */ 1262 x = txdr_unsigned(len); 1263 *tl++ = x; /* total to this offset */ 1264 *tl = x; /* size of this write */ 1265 1266 } 1267 if (pageprotected) { 1268 /* 1269 * since we know pages can't be modified during i/o, 1270 * no need to copy them for us. 1271 */ 1272 struct mbuf *m; 1273 struct iovec *iovp = uiop->uio_iov; 1274 1275 m = m_get(M_WAIT, MT_DATA); 1276 MCLAIM(m, &nfs_owner); 1277 MEXTADD(m, iovp->iov_base, len, M_MBUF, nfs_noop, NULL); 1278 m->m_flags |= M_EXT_ROMAP; 1279 m->m_len = len; 1280 mb->m_next = m; 1281 /* 1282 * no need to maintain mb and bpos here 1283 * because no one care them later. 1284 */ 1285 #if 0 1286 mb = m; 1287 bpos = mtod(caddr_t, mb) + mb->m_len; 1288 #endif 1289 iovp->iov_base = (char *)iovp->iov_base + len; 1290 iovp->iov_len -= len; 1291 uiop->uio_offset += len; 1292 uiop->uio_resid -= len; 1293 } else { 1294 nfsm_uiotom(uiop, len); 1295 } 1296 nfsm_request(np, NFSPROC_WRITE, uiop->uio_procp, 1297 VTONFS(vp)->n_wcred); 1298 if (v3) { 1299 wccflag = NFSV3_WCCCHK; 1300 nfsm_wcc_data(vp, wccflag, NAC_NOTRUNC); 1301 if (!error) { 1302 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED 1303 + NFSX_V3WRITEVERF); 1304 rlen = fxdr_unsigned(int, *tl++); 1305 if (rlen == 0) { 1306 error = NFSERR_IO; 1307 m_freem(mrep); 1308 break; 1309 } else if (rlen < len) { 1310 backup = len - rlen; 1311 uiop->uio_iov->iov_base = 1312 (caddr_t)uiop->uio_iov->iov_base - 1313 backup; 1314 uiop->uio_iov->iov_len += backup; 1315 uiop->uio_offset -= backup; 1316 uiop->uio_resid += backup; 1317 len = rlen; 1318 } 1319 commit = fxdr_unsigned(int, *tl++); 1320 1321 /* 1322 * Return the lowest committment level 1323 * obtained by any of the RPCs. 1324 */ 1325 if (committed == NFSV3WRITE_FILESYNC) 1326 committed = commit; 1327 else if (committed == NFSV3WRITE_DATASYNC && 1328 commit == NFSV3WRITE_UNSTABLE) 1329 committed = commit; 1330 simple_lock(&nmp->nm_slock); 1331 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){ 1332 memcpy(nmp->nm_writeverf, tl, 1333 NFSX_V3WRITEVERF); 1334 nmp->nm_iflag |= NFSMNT_HASWRITEVERF; 1335 } else if ((nmp->nm_iflag & 1336 NFSMNT_STALEWRITEVERF) || 1337 memcmp(tl, nmp->nm_writeverf, 1338 NFSX_V3WRITEVERF)) { 1339 *stalewriteverf = TRUE; 1340 memcpy(nmp->nm_writeverf, tl, 1341 NFSX_V3WRITEVERF); 1342 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 1343 } 1344 simple_unlock(&nmp->nm_slock); 1345 } 1346 } else 1347 nfsm_loadattr(vp, (struct vattr *)0, NAC_NOTRUNC); 1348 if (wccflag) 1349 VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec; 1350 m_freem(mrep); 1351 if (error) 1352 break; 1353 tsiz -= len; 1354 } 1355 nfsmout: 1356 *iomode = committed; 1357 if (error) 1358 uiop->uio_resid = tsiz; 1359 return (error); 1360 } 1361 1362 /* 1363 * nfs mknod rpc 1364 * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the 1365 * mode set to specify the file type and the size field for rdev. 1366 */ 1367 int 1368 nfs_mknodrpc(dvp, vpp, cnp, vap) 1369 struct vnode *dvp; 1370 struct vnode **vpp; 1371 struct componentname *cnp; 1372 struct vattr *vap; 1373 { 1374 struct nfsv2_sattr *sp; 1375 u_int32_t *tl; 1376 caddr_t cp; 1377 int32_t t1, t2; 1378 struct vnode *newvp = (struct vnode *)0; 1379 struct nfsnode *dnp, *np; 1380 char *cp2; 1381 caddr_t bpos, dpos; 1382 int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; 1383 struct mbuf *mreq, *mrep, *md, *mb; 1384 u_int32_t rdev; 1385 const int v3 = NFS_ISV3(dvp); 1386 1387 if (vap->va_type == VCHR || vap->va_type == VBLK) 1388 rdev = txdr_unsigned(vap->va_rdev); 1389 else if (vap->va_type == VFIFO || vap->va_type == VSOCK) 1390 rdev = nfs_xdrneg1; 1391 else { 1392 VOP_ABORTOP(dvp, cnp); 1393 vput(dvp); 1394 return (EOPNOTSUPP); 1395 } 1396 nfsstats.rpccnt[NFSPROC_MKNOD]++; 1397 dnp = VTONFS(dvp); 1398 nfsm_reqhead(dnp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED + 1399 + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1400 nfsm_fhtom(dnp, v3); 1401 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1402 if (v3) { 1403 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1404 *tl++ = vtonfsv3_type(vap->va_type); 1405 nfsm_v3attrbuild(vap, FALSE); 1406 if (vap->va_type == VCHR || vap->va_type == VBLK) { 1407 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1408 *tl++ = txdr_unsigned(major(vap->va_rdev)); 1409 *tl = txdr_unsigned(minor(vap->va_rdev)); 1410 } 1411 } else { 1412 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1413 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1414 sp->sa_uid = nfs_xdrneg1; 1415 sp->sa_gid = nfs_xdrneg1; 1416 sp->sa_size = rdev; 1417 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1418 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1419 } 1420 nfsm_request(dnp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred); 1421 if (!error) { 1422 nfsm_mtofh(dvp, newvp, v3, gotvp); 1423 if (!gotvp) { 1424 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1425 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1426 if (!error) 1427 newvp = NFSTOV(np); 1428 } 1429 } 1430 if (v3) 1431 nfsm_wcc_data(dvp, wccflag, 0); 1432 nfsm_reqdone; 1433 if (error) { 1434 if (newvp) 1435 vput(newvp); 1436 } else { 1437 if (cnp->cn_flags & MAKEENTRY) 1438 cache_enter(dvp, newvp, cnp); 1439 *vpp = newvp; 1440 } 1441 PNBUF_PUT(cnp->cn_pnbuf); 1442 VTONFS(dvp)->n_flag |= NMODIFIED; 1443 if (!wccflag) 1444 VTONFS(dvp)->n_attrstamp = 0; 1445 vput(dvp); 1446 return (error); 1447 } 1448 1449 /* 1450 * nfs mknod vop 1451 * just call nfs_mknodrpc() to do the work. 1452 */ 1453 /* ARGSUSED */ 1454 int 1455 nfs_mknod(v) 1456 void *v; 1457 { 1458 struct vop_mknod_args /* { 1459 struct vnode *a_dvp; 1460 struct vnode **a_vpp; 1461 struct componentname *a_cnp; 1462 struct vattr *a_vap; 1463 } */ *ap = v; 1464 int error; 1465 1466 error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); 1467 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1468 return (error); 1469 } 1470 1471 static u_long create_verf; 1472 /* 1473 * nfs file create call 1474 */ 1475 int 1476 nfs_create(v) 1477 void *v; 1478 { 1479 struct vop_create_args /* { 1480 struct vnode *a_dvp; 1481 struct vnode **a_vpp; 1482 struct componentname *a_cnp; 1483 struct vattr *a_vap; 1484 } */ *ap = v; 1485 struct vnode *dvp = ap->a_dvp; 1486 struct vattr *vap = ap->a_vap; 1487 struct componentname *cnp = ap->a_cnp; 1488 struct nfsv2_sattr *sp; 1489 u_int32_t *tl; 1490 caddr_t cp; 1491 int32_t t1, t2; 1492 struct nfsnode *dnp, *np = (struct nfsnode *)0; 1493 struct vnode *newvp = (struct vnode *)0; 1494 caddr_t bpos, dpos, cp2; 1495 int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; 1496 struct mbuf *mreq, *mrep, *md, *mb; 1497 const int v3 = NFS_ISV3(dvp); 1498 1499 /* 1500 * Oops, not for me.. 1501 */ 1502 if (vap->va_type == VSOCK) 1503 return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); 1504 1505 #ifdef VA_EXCLUSIVE 1506 if (vap->va_vaflags & VA_EXCLUSIVE) 1507 fmode |= O_EXCL; 1508 #endif 1509 again: 1510 error = 0; 1511 nfsstats.rpccnt[NFSPROC_CREATE]++; 1512 dnp = VTONFS(dvp); 1513 nfsm_reqhead(dnp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED + 1514 nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3)); 1515 nfsm_fhtom(dnp, v3); 1516 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1517 if (v3) { 1518 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1519 if (fmode & O_EXCL) { 1520 *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); 1521 nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF); 1522 #ifdef INET 1523 if (TAILQ_FIRST(&in_ifaddr)) 1524 *tl++ = TAILQ_FIRST(&in_ifaddr)->ia_addr.sin_addr.s_addr; 1525 else 1526 *tl++ = create_verf; 1527 #else 1528 *tl++ = create_verf; 1529 #endif 1530 *tl = ++create_verf; 1531 } else { 1532 *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); 1533 nfsm_v3attrbuild(vap, FALSE); 1534 } 1535 } else { 1536 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1537 sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1538 sp->sa_uid = nfs_xdrneg1; 1539 sp->sa_gid = nfs_xdrneg1; 1540 sp->sa_size = 0; 1541 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1542 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1543 } 1544 nfsm_request(dnp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred); 1545 if (!error) { 1546 nfsm_mtofh(dvp, newvp, v3, gotvp); 1547 if (!gotvp) { 1548 error = nfs_lookitup(dvp, cnp->cn_nameptr, 1549 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np); 1550 if (!error) 1551 newvp = NFSTOV(np); 1552 } 1553 } 1554 if (v3) 1555 nfsm_wcc_data(dvp, wccflag, 0); 1556 nfsm_reqdone; 1557 if (error) { 1558 if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { 1559 fmode &= ~O_EXCL; 1560 goto again; 1561 } 1562 if (newvp) 1563 vput(newvp); 1564 } else if (v3 && (fmode & O_EXCL)) 1565 error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc); 1566 if (!error) { 1567 if (cnp->cn_flags & MAKEENTRY) 1568 cache_enter(dvp, newvp, cnp); 1569 *ap->a_vpp = newvp; 1570 } 1571 PNBUF_PUT(cnp->cn_pnbuf); 1572 VTONFS(dvp)->n_flag |= NMODIFIED; 1573 if (!wccflag) 1574 VTONFS(dvp)->n_attrstamp = 0; 1575 VN_KNOTE(ap->a_dvp, NOTE_WRITE); 1576 vput(dvp); 1577 return (error); 1578 } 1579 1580 /* 1581 * nfs file remove call 1582 * To try and make nfs semantics closer to ufs semantics, a file that has 1583 * other processes using the vnode is renamed instead of removed and then 1584 * removed later on the last close. 1585 * - If v_usecount > 1 1586 * If a rename is not already in the works 1587 * call nfs_sillyrename() to set it up 1588 * else 1589 * do the remove rpc 1590 */ 1591 int 1592 nfs_remove(v) 1593 void *v; 1594 { 1595 struct vop_remove_args /* { 1596 struct vnodeop_desc *a_desc; 1597 struct vnode * a_dvp; 1598 struct vnode * a_vp; 1599 struct componentname * a_cnp; 1600 } */ *ap = v; 1601 struct vnode *vp = ap->a_vp; 1602 struct vnode *dvp = ap->a_dvp; 1603 struct componentname *cnp = ap->a_cnp; 1604 struct nfsnode *np = VTONFS(vp); 1605 int error = 0; 1606 struct vattr vattr; 1607 1608 #ifndef DIAGNOSTIC 1609 if ((cnp->cn_flags & HASBUF) == 0) 1610 panic("nfs_remove: no name"); 1611 if (vp->v_usecount < 1) 1612 panic("nfs_remove: bad v_usecount"); 1613 #endif 1614 if (vp->v_type == VDIR) 1615 error = EPERM; 1616 else if (vp->v_usecount == 1 || (np->n_sillyrename && 1617 VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 && 1618 vattr.va_nlink > 1)) { 1619 /* 1620 * Purge the name cache so that the chance of a lookup for 1621 * the name succeeding while the remove is in progress is 1622 * minimized. Without node locking it can still happen, such 1623 * that an I/O op returns ESTALE, but since you get this if 1624 * another host removes the file.. 1625 */ 1626 cache_purge(vp); 1627 /* 1628 * throw away biocache buffers, mainly to avoid 1629 * unnecessary delayed writes later. 1630 */ 1631 error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1); 1632 /* Do the rpc */ 1633 if (error != EINTR) 1634 error = nfs_removerpc(dvp, cnp->cn_nameptr, 1635 cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc); 1636 /* 1637 * Kludge City: If the first reply to the remove rpc is lost.. 1638 * the reply to the retransmitted request will be ENOENT 1639 * since the file was in fact removed 1640 * Therefore, we cheat and return success. 1641 */ 1642 if (error == ENOENT) 1643 error = 0; 1644 } else if (!np->n_sillyrename) 1645 error = nfs_sillyrename(dvp, vp, cnp); 1646 PNBUF_PUT(cnp->cn_pnbuf); 1647 np->n_attrstamp = 0; 1648 VN_KNOTE(vp, NOTE_DELETE); 1649 VN_KNOTE(dvp, NOTE_WRITE); 1650 if (dvp == vp) 1651 vrele(vp); 1652 else 1653 vput(vp); 1654 vput(dvp); 1655 return (error); 1656 } 1657 1658 /* 1659 * nfs file remove rpc called from nfs_inactive 1660 */ 1661 int 1662 nfs_removeit(sp) 1663 struct sillyrename *sp; 1664 { 1665 1666 return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred, 1667 (struct proc *)0)); 1668 } 1669 1670 /* 1671 * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). 1672 */ 1673 int 1674 nfs_removerpc(dvp, name, namelen, cred, proc) 1675 struct vnode *dvp; 1676 const char *name; 1677 int namelen; 1678 struct ucred *cred; 1679 struct proc *proc; 1680 { 1681 u_int32_t *tl; 1682 caddr_t cp; 1683 int32_t t1, t2; 1684 caddr_t bpos, dpos, cp2; 1685 int error = 0, wccflag = NFSV3_WCCRATTR; 1686 struct mbuf *mreq, *mrep, *md, *mb; 1687 const int v3 = NFS_ISV3(dvp); 1688 struct nfsnode *dnp = VTONFS(dvp); 1689 1690 nfsstats.rpccnt[NFSPROC_REMOVE]++; 1691 nfsm_reqhead(dnp, NFSPROC_REMOVE, 1692 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); 1693 nfsm_fhtom(dnp, v3); 1694 nfsm_strtom(name, namelen, NFS_MAXNAMLEN); 1695 nfsm_request(dnp, NFSPROC_REMOVE, proc, cred); 1696 if (v3) 1697 nfsm_wcc_data(dvp, wccflag, 0); 1698 nfsm_reqdone; 1699 VTONFS(dvp)->n_flag |= NMODIFIED; 1700 if (!wccflag) 1701 VTONFS(dvp)->n_attrstamp = 0; 1702 return (error); 1703 } 1704 1705 /* 1706 * nfs file rename call 1707 */ 1708 int 1709 nfs_rename(v) 1710 void *v; 1711 { 1712 struct vop_rename_args /* { 1713 struct vnode *a_fdvp; 1714 struct vnode *a_fvp; 1715 struct componentname *a_fcnp; 1716 struct vnode *a_tdvp; 1717 struct vnode *a_tvp; 1718 struct componentname *a_tcnp; 1719 } */ *ap = v; 1720 struct vnode *fvp = ap->a_fvp; 1721 struct vnode *tvp = ap->a_tvp; 1722 struct vnode *fdvp = ap->a_fdvp; 1723 struct vnode *tdvp = ap->a_tdvp; 1724 struct componentname *tcnp = ap->a_tcnp; 1725 struct componentname *fcnp = ap->a_fcnp; 1726 int error; 1727 1728 #ifndef DIAGNOSTIC 1729 if ((tcnp->cn_flags & HASBUF) == 0 || 1730 (fcnp->cn_flags & HASBUF) == 0) 1731 panic("nfs_rename: no name"); 1732 #endif 1733 /* Check for cross-device rename */ 1734 if ((fvp->v_mount != tdvp->v_mount) || 1735 (tvp && (fvp->v_mount != tvp->v_mount))) { 1736 error = EXDEV; 1737 goto out; 1738 } 1739 1740 /* 1741 * If the tvp exists and is in use, sillyrename it before doing the 1742 * rename of the new file over it. 1743 */ 1744 if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename && 1745 tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { 1746 VN_KNOTE(tvp, NOTE_DELETE); 1747 vput(tvp); 1748 tvp = NULL; 1749 } 1750 1751 error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, 1752 tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, 1753 tcnp->cn_proc); 1754 1755 VN_KNOTE(fdvp, NOTE_WRITE); 1756 VN_KNOTE(tdvp, NOTE_WRITE); 1757 if (fvp->v_type == VDIR) { 1758 if (tvp != NULL && tvp->v_type == VDIR) 1759 cache_purge(tdvp); 1760 cache_purge(fdvp); 1761 } 1762 out: 1763 if (tdvp == tvp) 1764 vrele(tdvp); 1765 else 1766 vput(tdvp); 1767 if (tvp) 1768 vput(tvp); 1769 vrele(fdvp); 1770 vrele(fvp); 1771 /* 1772 * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. 1773 */ 1774 if (error == ENOENT) 1775 error = 0; 1776 return (error); 1777 } 1778 1779 /* 1780 * nfs file rename rpc called from nfs_remove() above 1781 */ 1782 int 1783 nfs_renameit(sdvp, scnp, sp) 1784 struct vnode *sdvp; 1785 struct componentname *scnp; 1786 struct sillyrename *sp; 1787 { 1788 return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, 1789 sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc)); 1790 } 1791 1792 /* 1793 * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). 1794 */ 1795 int 1796 nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc) 1797 struct vnode *fdvp; 1798 const char *fnameptr; 1799 int fnamelen; 1800 struct vnode *tdvp; 1801 const char *tnameptr; 1802 int tnamelen; 1803 struct ucred *cred; 1804 struct proc *proc; 1805 { 1806 u_int32_t *tl; 1807 caddr_t cp; 1808 int32_t t1, t2; 1809 caddr_t bpos, dpos, cp2; 1810 int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; 1811 struct mbuf *mreq, *mrep, *md, *mb; 1812 const int v3 = NFS_ISV3(fdvp); 1813 struct nfsnode *fdnp = VTONFS(fdvp); 1814 1815 nfsstats.rpccnt[NFSPROC_RENAME]++; 1816 nfsm_reqhead(fdnp, NFSPROC_RENAME, 1817 (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) + 1818 nfsm_rndup(tnamelen)); 1819 nfsm_fhtom(fdnp, v3); 1820 nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN); 1821 nfsm_fhtom(VTONFS(tdvp), v3); 1822 nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN); 1823 nfsm_request(fdnp, NFSPROC_RENAME, proc, cred); 1824 if (v3) { 1825 nfsm_wcc_data(fdvp, fwccflag, 0); 1826 nfsm_wcc_data(tdvp, twccflag, 0); 1827 } 1828 nfsm_reqdone; 1829 VTONFS(fdvp)->n_flag |= NMODIFIED; 1830 VTONFS(tdvp)->n_flag |= NMODIFIED; 1831 if (!fwccflag) 1832 VTONFS(fdvp)->n_attrstamp = 0; 1833 if (!twccflag) 1834 VTONFS(tdvp)->n_attrstamp = 0; 1835 return (error); 1836 } 1837 1838 /* 1839 * nfs hard link create call 1840 */ 1841 int 1842 nfs_link(v) 1843 void *v; 1844 { 1845 struct vop_link_args /* { 1846 struct vnode *a_dvp; 1847 struct vnode *a_vp; 1848 struct componentname *a_cnp; 1849 } */ *ap = v; 1850 struct vnode *vp = ap->a_vp; 1851 struct vnode *dvp = ap->a_dvp; 1852 struct componentname *cnp = ap->a_cnp; 1853 u_int32_t *tl; 1854 caddr_t cp; 1855 int32_t t1, t2; 1856 caddr_t bpos, dpos, cp2; 1857 int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; 1858 struct mbuf *mreq, *mrep, *md, *mb; 1859 /* XXX Should be const and initialised? */ 1860 int v3; 1861 struct nfsnode *np; 1862 1863 if (dvp->v_mount != vp->v_mount) { 1864 VOP_ABORTOP(dvp, cnp); 1865 vput(dvp); 1866 return (EXDEV); 1867 } 1868 if (dvp != vp) { 1869 error = vn_lock(vp, LK_EXCLUSIVE); 1870 if (error != 0) { 1871 VOP_ABORTOP(dvp, cnp); 1872 vput(dvp); 1873 return error; 1874 } 1875 } 1876 1877 /* 1878 * Push all writes to the server, so that the attribute cache 1879 * doesn't get "out of sync" with the server. 1880 * XXX There should be a better way! 1881 */ 1882 VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc); 1883 1884 v3 = NFS_ISV3(vp); 1885 nfsstats.rpccnt[NFSPROC_LINK]++; 1886 np = VTONFS(vp); 1887 nfsm_reqhead(np, NFSPROC_LINK, 1888 NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 1889 nfsm_fhtom(np, v3); 1890 nfsm_fhtom(VTONFS(dvp), v3); 1891 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1892 nfsm_request(np, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred); 1893 if (v3) { 1894 nfsm_postop_attr(vp, attrflag, 0); 1895 nfsm_wcc_data(dvp, wccflag, 0); 1896 } 1897 nfsm_reqdone; 1898 PNBUF_PUT(cnp->cn_pnbuf); 1899 VTONFS(dvp)->n_flag |= NMODIFIED; 1900 if (!attrflag) 1901 VTONFS(vp)->n_attrstamp = 0; 1902 if (!wccflag) 1903 VTONFS(dvp)->n_attrstamp = 0; 1904 if (dvp != vp) 1905 VOP_UNLOCK(vp, 0); 1906 VN_KNOTE(vp, NOTE_LINK); 1907 VN_KNOTE(dvp, NOTE_WRITE); 1908 vput(dvp); 1909 /* 1910 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1911 */ 1912 if (error == EEXIST) 1913 error = 0; 1914 return (error); 1915 } 1916 1917 /* 1918 * nfs symbolic link create call 1919 */ 1920 int 1921 nfs_symlink(v) 1922 void *v; 1923 { 1924 struct vop_symlink_args /* { 1925 struct vnode *a_dvp; 1926 struct vnode **a_vpp; 1927 struct componentname *a_cnp; 1928 struct vattr *a_vap; 1929 char *a_target; 1930 } */ *ap = v; 1931 struct vnode *dvp = ap->a_dvp; 1932 struct vattr *vap = ap->a_vap; 1933 struct componentname *cnp = ap->a_cnp; 1934 struct nfsv2_sattr *sp; 1935 u_int32_t *tl; 1936 caddr_t cp; 1937 int32_t t1, t2; 1938 caddr_t bpos, dpos, cp2; 1939 int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; 1940 struct mbuf *mreq, *mrep, *md, *mb; 1941 struct vnode *newvp = (struct vnode *)0; 1942 const int v3 = NFS_ISV3(dvp); 1943 struct nfsnode *dnp = VTONFS(dvp); 1944 1945 *ap->a_vpp = NULL; 1946 nfsstats.rpccnt[NFSPROC_SYMLINK]++; 1947 slen = strlen(ap->a_target); 1948 nfsm_reqhead(dnp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED + 1949 nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3)); 1950 nfsm_fhtom(dnp, v3); 1951 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 1952 if (v3) 1953 nfsm_v3attrbuild(vap, FALSE); 1954 nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN); 1955 if (!v3) { 1956 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 1957 sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); 1958 sp->sa_uid = nfs_xdrneg1; 1959 sp->sa_gid = nfs_xdrneg1; 1960 sp->sa_size = nfs_xdrneg1; 1961 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 1962 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 1963 } 1964 nfsm_request(dnp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred); 1965 if (v3) { 1966 if (!error) 1967 nfsm_mtofh(dvp, newvp, v3, gotvp); 1968 nfsm_wcc_data(dvp, wccflag, 0); 1969 } 1970 nfsm_reqdone; 1971 /* 1972 * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. 1973 */ 1974 if (error == EEXIST) 1975 error = 0; 1976 if (error == 0 && newvp == NULL) { 1977 struct nfsnode *np = NULL; 1978 1979 error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, 1980 cnp->cn_cred, cnp->cn_proc, &np); 1981 if (error == 0) 1982 newvp = NFSTOV(np); 1983 } 1984 if (error) { 1985 if (newvp != NULL) 1986 vput(newvp); 1987 } else { 1988 *ap->a_vpp = newvp; 1989 } 1990 PNBUF_PUT(cnp->cn_pnbuf); 1991 VTONFS(dvp)->n_flag |= NMODIFIED; 1992 if (!wccflag) 1993 VTONFS(dvp)->n_attrstamp = 0; 1994 VN_KNOTE(dvp, NOTE_WRITE); 1995 vput(dvp); 1996 return (error); 1997 } 1998 1999 /* 2000 * nfs make dir call 2001 */ 2002 int 2003 nfs_mkdir(v) 2004 void *v; 2005 { 2006 struct vop_mkdir_args /* { 2007 struct vnode *a_dvp; 2008 struct vnode **a_vpp; 2009 struct componentname *a_cnp; 2010 struct vattr *a_vap; 2011 } */ *ap = v; 2012 struct vnode *dvp = ap->a_dvp; 2013 struct vattr *vap = ap->a_vap; 2014 struct componentname *cnp = ap->a_cnp; 2015 struct nfsv2_sattr *sp; 2016 u_int32_t *tl; 2017 caddr_t cp; 2018 int32_t t1, t2; 2019 int len; 2020 struct nfsnode *dnp = VTONFS(dvp), *np = (struct nfsnode *)0; 2021 struct vnode *newvp = (struct vnode *)0; 2022 caddr_t bpos, dpos, cp2; 2023 int error = 0, wccflag = NFSV3_WCCRATTR; 2024 int gotvp = 0; 2025 struct mbuf *mreq, *mrep, *md, *mb; 2026 const int v3 = NFS_ISV3(dvp); 2027 2028 len = cnp->cn_namelen; 2029 nfsstats.rpccnt[NFSPROC_MKDIR]++; 2030 nfsm_reqhead(dnp, NFSPROC_MKDIR, 2031 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3)); 2032 nfsm_fhtom(dnp, v3); 2033 nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN); 2034 if (v3) { 2035 nfsm_v3attrbuild(vap, FALSE); 2036 } else { 2037 nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR); 2038 sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); 2039 sp->sa_uid = nfs_xdrneg1; 2040 sp->sa_gid = nfs_xdrneg1; 2041 sp->sa_size = nfs_xdrneg1; 2042 txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); 2043 txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); 2044 } 2045 nfsm_request(dnp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred); 2046 if (!error) 2047 nfsm_mtofh(dvp, newvp, v3, gotvp); 2048 if (v3) 2049 nfsm_wcc_data(dvp, wccflag, 0); 2050 nfsm_reqdone; 2051 VTONFS(dvp)->n_flag |= NMODIFIED; 2052 if (!wccflag) 2053 VTONFS(dvp)->n_attrstamp = 0; 2054 /* 2055 * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry 2056 * if we can succeed in looking up the directory. 2057 */ 2058 if (error == EEXIST || (!error && !gotvp)) { 2059 if (newvp) { 2060 vput(newvp); 2061 newvp = (struct vnode *)0; 2062 } 2063 error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, 2064 cnp->cn_proc, &np); 2065 if (!error) { 2066 newvp = NFSTOV(np); 2067 if (newvp->v_type != VDIR) 2068 error = EEXIST; 2069 } 2070 } 2071 if (error) { 2072 if (newvp) 2073 vput(newvp); 2074 } else { 2075 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2076 if (cnp->cn_flags & MAKEENTRY) 2077 cache_enter(dvp, newvp, cnp); 2078 *ap->a_vpp = newvp; 2079 } 2080 PNBUF_PUT(cnp->cn_pnbuf); 2081 vput(dvp); 2082 return (error); 2083 } 2084 2085 /* 2086 * nfs remove directory call 2087 */ 2088 int 2089 nfs_rmdir(v) 2090 void *v; 2091 { 2092 struct vop_rmdir_args /* { 2093 struct vnode *a_dvp; 2094 struct vnode *a_vp; 2095 struct componentname *a_cnp; 2096 } */ *ap = v; 2097 struct vnode *vp = ap->a_vp; 2098 struct vnode *dvp = ap->a_dvp; 2099 struct componentname *cnp = ap->a_cnp; 2100 u_int32_t *tl; 2101 caddr_t cp; 2102 int32_t t1, t2; 2103 caddr_t bpos, dpos, cp2; 2104 int error = 0, wccflag = NFSV3_WCCRATTR; 2105 struct mbuf *mreq, *mrep, *md, *mb; 2106 const int v3 = NFS_ISV3(dvp); 2107 struct nfsnode *dnp; 2108 2109 if (dvp == vp) { 2110 vrele(dvp); 2111 vput(dvp); 2112 PNBUF_PUT(cnp->cn_pnbuf); 2113 return (EINVAL); 2114 } 2115 nfsstats.rpccnt[NFSPROC_RMDIR]++; 2116 dnp = VTONFS(dvp); 2117 nfsm_reqhead(dnp, NFSPROC_RMDIR, 2118 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen)); 2119 nfsm_fhtom(dnp, v3); 2120 nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN); 2121 nfsm_request(dnp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred); 2122 if (v3) 2123 nfsm_wcc_data(dvp, wccflag, 0); 2124 nfsm_reqdone; 2125 PNBUF_PUT(cnp->cn_pnbuf); 2126 VTONFS(dvp)->n_flag |= NMODIFIED; 2127 if (!wccflag) 2128 VTONFS(dvp)->n_attrstamp = 0; 2129 VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK); 2130 VN_KNOTE(vp, NOTE_DELETE); 2131 cache_purge(dvp); 2132 cache_purge(vp); 2133 vput(vp); 2134 vput(dvp); 2135 /* 2136 * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. 2137 */ 2138 if (error == ENOENT) 2139 error = 0; 2140 return (error); 2141 } 2142 2143 /* 2144 * nfs readdir call 2145 */ 2146 int 2147 nfs_readdir(v) 2148 void *v; 2149 { 2150 struct vop_readdir_args /* { 2151 struct vnode *a_vp; 2152 struct uio *a_uio; 2153 struct ucred *a_cred; 2154 int *a_eofflag; 2155 off_t **a_cookies; 2156 int *a_ncookies; 2157 } */ *ap = v; 2158 struct vnode *vp = ap->a_vp; 2159 struct uio *uio = ap->a_uio; 2160 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2161 char *base = uio->uio_iov->iov_base; 2162 int tresid, error; 2163 size_t count, lost; 2164 struct dirent *dp; 2165 off_t *cookies = NULL; 2166 int ncookies = 0, nc; 2167 2168 if (vp->v_type != VDIR) 2169 return (EPERM); 2170 2171 lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1); 2172 count = uio->uio_resid - lost; 2173 if (count <= 0) 2174 return (EINVAL); 2175 2176 /* 2177 * Call nfs_bioread() to do the real work. 2178 */ 2179 tresid = uio->uio_resid = count; 2180 error = nfs_bioread(vp, uio, 0, ap->a_cred, 2181 ap->a_cookies ? NFSBIO_CACHECOOKIES : 0); 2182 2183 if (!error && ap->a_cookies) { 2184 ncookies = count / 16; 2185 cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK); 2186 *ap->a_cookies = cookies; 2187 } 2188 2189 if (!error && uio->uio_resid == tresid) { 2190 uio->uio_resid += lost; 2191 nfsstats.direofcache_misses++; 2192 if (ap->a_cookies) 2193 *ap->a_ncookies = 0; 2194 *ap->a_eofflag = 1; 2195 return (0); 2196 } 2197 2198 if (!error && ap->a_cookies) { 2199 /* 2200 * Only the NFS server and emulations use cookies, and they 2201 * load the directory block into system space, so we can 2202 * just look at it directly. 2203 */ 2204 if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2205 panic("nfs_readdir: lost in space"); 2206 for (nc = 0; ncookies-- && 2207 base < (char *)uio->uio_iov->iov_base; nc++){ 2208 dp = (struct dirent *) base; 2209 if (dp->d_reclen == 0) 2210 break; 2211 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) 2212 *(cookies++) = (off_t)NFS_GETCOOKIE32(dp); 2213 else 2214 *(cookies++) = NFS_GETCOOKIE(dp); 2215 base += dp->d_reclen; 2216 } 2217 uio->uio_resid += 2218 ((caddr_t)uio->uio_iov->iov_base - base); 2219 uio->uio_iov->iov_len += 2220 ((caddr_t)uio->uio_iov->iov_base - base); 2221 uio->uio_iov->iov_base = base; 2222 *ap->a_ncookies = nc; 2223 } 2224 2225 uio->uio_resid += lost; 2226 *ap->a_eofflag = 0; 2227 return (error); 2228 } 2229 2230 /* 2231 * Readdir rpc call. 2232 * Called from below the buffer cache by nfs_doio(). 2233 */ 2234 int 2235 nfs_readdirrpc(vp, uiop, cred) 2236 struct vnode *vp; 2237 struct uio *uiop; 2238 struct ucred *cred; 2239 { 2240 int len, left; 2241 struct dirent *dp = NULL; 2242 u_int32_t *tl; 2243 caddr_t cp; 2244 int32_t t1, t2; 2245 caddr_t bpos, dpos, cp2; 2246 struct mbuf *mreq, *mrep, *md, *mb; 2247 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2248 struct nfsnode *dnp = VTONFS(vp); 2249 u_quad_t fileno; 2250 int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; 2251 int attrflag, nrpcs = 0, reclen; 2252 const int v3 = NFS_ISV3(vp); 2253 2254 #ifdef DIAGNOSTIC 2255 /* 2256 * Should be called from buffer cache, so only amount of 2257 * NFS_DIRBLKSIZ will be requested. 2258 */ 2259 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2260 panic("nfs readdirrpc bad uio"); 2261 #endif 2262 2263 /* 2264 * Loop around doing readdir rpc's of size nm_readdirsize 2265 * truncated to a multiple of NFS_DIRFRAGSIZ. 2266 * The stopping criteria is EOF or buffer full. 2267 */ 2268 while (more_dirs && bigenough) { 2269 /* 2270 * Heuristic: don't bother to do another RPC to further 2271 * fill up this block if there is not much room left. (< 50% 2272 * of the readdir RPC size). This wastes some buffer space 2273 * but can save up to 50% in RPC calls. 2274 */ 2275 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2276 bigenough = 0; 2277 break; 2278 } 2279 nfsstats.rpccnt[NFSPROC_READDIR]++; 2280 nfsm_reqhead(dnp, NFSPROC_READDIR, NFSX_FH(v3) + 2281 NFSX_READDIR(v3)); 2282 nfsm_fhtom(dnp, v3); 2283 if (v3) { 2284 nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED); 2285 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2286 txdr_swapcookie3(uiop->uio_offset, tl); 2287 } else { 2288 txdr_cookie3(uiop->uio_offset, tl); 2289 } 2290 tl += 2; 2291 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2292 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2293 } else { 2294 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 2295 *tl++ = txdr_unsigned(uiop->uio_offset); 2296 } 2297 *tl = txdr_unsigned(nmp->nm_readdirsize); 2298 nfsm_request(dnp, NFSPROC_READDIR, uiop->uio_procp, cred); 2299 nrpcs++; 2300 if (v3) { 2301 nfsm_postop_attr(vp, attrflag, 0); 2302 if (!error) { 2303 nfsm_dissect(tl, u_int32_t *, 2304 2 * NFSX_UNSIGNED); 2305 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2306 dnp->n_cookieverf.nfsuquad[1] = *tl; 2307 } else { 2308 m_freem(mrep); 2309 goto nfsmout; 2310 } 2311 } 2312 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2313 more_dirs = fxdr_unsigned(int, *tl); 2314 2315 /* loop thru the dir entries, doctoring them to 4bsd form */ 2316 while (more_dirs && bigenough) { 2317 if (v3) { 2318 nfsm_dissect(tl, u_int32_t *, 2319 3 * NFSX_UNSIGNED); 2320 fileno = fxdr_hyper(tl); 2321 len = fxdr_unsigned(int, *(tl + 2)); 2322 } else { 2323 nfsm_dissect(tl, u_int32_t *, 2324 2 * NFSX_UNSIGNED); 2325 fileno = fxdr_unsigned(u_quad_t, *tl++); 2326 len = fxdr_unsigned(int, *tl); 2327 } 2328 if (len <= 0 || len > NFS_MAXNAMLEN) { 2329 error = EBADRPC; 2330 m_freem(mrep); 2331 goto nfsmout; 2332 } 2333 tlen = nfsm_rndup(len); 2334 if (tlen == len) 2335 tlen += 4; /* To ensure null termination */ 2336 tlen += sizeof (off_t) + sizeof (int); 2337 reclen = ALIGN(tlen + DIRHDSIZ); 2338 tlen = reclen - DIRHDSIZ; 2339 left = NFS_DIRFRAGSIZ - blksiz; 2340 if (reclen > left) { 2341 dp->d_reclen += left; 2342 uiop->uio_iov->iov_base = 2343 (caddr_t)uiop->uio_iov->iov_base + left; 2344 uiop->uio_iov->iov_len -= left; 2345 uiop->uio_resid -= left; 2346 blksiz = 0; 2347 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2348 } 2349 if (reclen > uiop->uio_resid) 2350 bigenough = 0; 2351 if (bigenough) { 2352 dp = (struct dirent *)uiop->uio_iov->iov_base; 2353 dp->d_fileno = (int)fileno; 2354 dp->d_namlen = len; 2355 dp->d_reclen = reclen; 2356 dp->d_type = DT_UNKNOWN; 2357 blksiz += dp->d_reclen; 2358 if (blksiz == NFS_DIRFRAGSIZ) 2359 blksiz = 0; 2360 uiop->uio_resid -= DIRHDSIZ; 2361 uiop->uio_iov->iov_base = 2362 (caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ; 2363 uiop->uio_iov->iov_len -= DIRHDSIZ; 2364 nfsm_mtouio(uiop, len); 2365 cp = uiop->uio_iov->iov_base; 2366 tlen -= len; 2367 *cp = '\0'; /* null terminate */ 2368 uiop->uio_iov->iov_base = 2369 (caddr_t)uiop->uio_iov->iov_base + tlen; 2370 uiop->uio_iov->iov_len -= tlen; 2371 uiop->uio_resid -= tlen; 2372 } else 2373 nfsm_adv(nfsm_rndup(len)); 2374 if (v3) { 2375 nfsm_dissect(tl, u_int32_t *, 2376 3 * NFSX_UNSIGNED); 2377 } else { 2378 nfsm_dissect(tl, u_int32_t *, 2379 2 * NFSX_UNSIGNED); 2380 } 2381 if (bigenough) { 2382 if (v3) { 2383 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2384 uiop->uio_offset = 2385 fxdr_swapcookie3(tl); 2386 else 2387 uiop->uio_offset = 2388 fxdr_cookie3(tl); 2389 } 2390 else { 2391 uiop->uio_offset = 2392 fxdr_unsigned(off_t, *tl); 2393 } 2394 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2395 } 2396 if (v3) 2397 tl += 2; 2398 else 2399 tl++; 2400 more_dirs = fxdr_unsigned(int, *tl); 2401 } 2402 /* 2403 * If at end of rpc data, get the eof boolean 2404 */ 2405 if (!more_dirs) { 2406 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2407 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2408 } 2409 m_freem(mrep); 2410 } 2411 /* 2412 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2413 * by increasing d_reclen for the last record. 2414 */ 2415 if (blksiz > 0) { 2416 left = NFS_DIRFRAGSIZ - blksiz; 2417 dp->d_reclen += left; 2418 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2419 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2420 left; 2421 uiop->uio_iov->iov_len -= left; 2422 uiop->uio_resid -= left; 2423 } 2424 2425 /* 2426 * We are now either at the end of the directory or have filled the 2427 * block. 2428 */ 2429 if (bigenough) 2430 dnp->n_direofoffset = uiop->uio_offset; 2431 nfsmout: 2432 return (error); 2433 } 2434 2435 /* 2436 * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). 2437 */ 2438 int 2439 nfs_readdirplusrpc(vp, uiop, cred) 2440 struct vnode *vp; 2441 struct uio *uiop; 2442 struct ucred *cred; 2443 { 2444 int len, left; 2445 struct dirent *dp = NULL; 2446 u_int32_t *tl; 2447 caddr_t cp; 2448 int32_t t1, t2; 2449 struct vnode *newvp; 2450 caddr_t bpos, dpos, cp2; 2451 struct mbuf *mreq, *mrep, *md, *mb; 2452 struct nameidata nami, *ndp = &nami; 2453 struct componentname *cnp = &ndp->ni_cnd; 2454 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2455 struct nfsnode *dnp = VTONFS(vp), *np; 2456 nfsfh_t *fhp; 2457 u_quad_t fileno; 2458 int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; 2459 int attrflag, fhsize, nrpcs = 0, reclen; 2460 struct nfs_fattr fattr, *fp; 2461 2462 #ifdef DIAGNOSTIC 2463 if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1))) 2464 panic("nfs readdirplusrpc bad uio"); 2465 #endif 2466 ndp->ni_dvp = vp; 2467 newvp = NULLVP; 2468 2469 /* 2470 * Loop around doing readdir rpc's of size nm_readdirsize 2471 * truncated to a multiple of NFS_DIRFRAGSIZ. 2472 * The stopping criteria is EOF or buffer full. 2473 */ 2474 while (more_dirs && bigenough) { 2475 if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) { 2476 bigenough = 0; 2477 break; 2478 } 2479 nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; 2480 nfsm_reqhead(dnp, NFSPROC_READDIRPLUS, 2481 NFSX_FH(1) + 6 * NFSX_UNSIGNED); 2482 nfsm_fhtom(dnp, 1); 2483 nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED); 2484 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) { 2485 txdr_swapcookie3(uiop->uio_offset, tl); 2486 } else { 2487 txdr_cookie3(uiop->uio_offset, tl); 2488 } 2489 tl += 2; 2490 *tl++ = dnp->n_cookieverf.nfsuquad[0]; 2491 *tl++ = dnp->n_cookieverf.nfsuquad[1]; 2492 *tl++ = txdr_unsigned(nmp->nm_readdirsize); 2493 *tl = txdr_unsigned(nmp->nm_rsize); 2494 nfsm_request(dnp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred); 2495 nfsm_postop_attr(vp, attrflag, 0); 2496 if (error) { 2497 m_freem(mrep); 2498 goto nfsmout; 2499 } 2500 nrpcs++; 2501 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2502 dnp->n_cookieverf.nfsuquad[0] = *tl++; 2503 dnp->n_cookieverf.nfsuquad[1] = *tl++; 2504 more_dirs = fxdr_unsigned(int, *tl); 2505 2506 /* loop thru the dir entries, doctoring them to 4bsd form */ 2507 while (more_dirs && bigenough) { 2508 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2509 fileno = fxdr_hyper(tl); 2510 len = fxdr_unsigned(int, *(tl + 2)); 2511 if (len <= 0 || len > NFS_MAXNAMLEN) { 2512 error = EBADRPC; 2513 m_freem(mrep); 2514 goto nfsmout; 2515 } 2516 tlen = nfsm_rndup(len); 2517 if (tlen == len) 2518 tlen += 4; /* To ensure null termination*/ 2519 tlen += sizeof (off_t) + sizeof (int); 2520 reclen = ALIGN(tlen + DIRHDSIZ); 2521 tlen = reclen - DIRHDSIZ; 2522 left = NFS_DIRFRAGSIZ - blksiz; 2523 if (reclen > left) { 2524 /* 2525 * DIRFRAGSIZ is aligned, no need to align 2526 * again here. 2527 */ 2528 dp->d_reclen += left; 2529 uiop->uio_iov->iov_base = 2530 (caddr_t)uiop->uio_iov->iov_base + left; 2531 uiop->uio_iov->iov_len -= left; 2532 uiop->uio_resid -= left; 2533 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2534 blksiz = 0; 2535 } 2536 if (reclen > uiop->uio_resid) 2537 bigenough = 0; 2538 if (bigenough) { 2539 dp = (struct dirent *)uiop->uio_iov->iov_base; 2540 dp->d_fileno = (int)fileno; 2541 dp->d_namlen = len; 2542 dp->d_reclen = reclen; 2543 dp->d_type = DT_UNKNOWN; 2544 blksiz += dp->d_reclen; 2545 if (blksiz == NFS_DIRFRAGSIZ) 2546 blksiz = 0; 2547 uiop->uio_resid -= DIRHDSIZ; 2548 uiop->uio_iov->iov_base = 2549 (caddr_t)uiop->uio_iov->iov_base + 2550 DIRHDSIZ; 2551 uiop->uio_iov->iov_len -= DIRHDSIZ; 2552 cnp->cn_nameptr = uiop->uio_iov->iov_base; 2553 cnp->cn_namelen = len; 2554 nfsm_mtouio(uiop, len); 2555 cp = uiop->uio_iov->iov_base; 2556 tlen -= len; 2557 *cp = '\0'; 2558 uiop->uio_iov->iov_base = 2559 (caddr_t)uiop->uio_iov->iov_base + tlen; 2560 uiop->uio_iov->iov_len -= tlen; 2561 uiop->uio_resid -= tlen; 2562 } else 2563 nfsm_adv(nfsm_rndup(len)); 2564 nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2565 if (bigenough) { 2566 if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) 2567 uiop->uio_offset = 2568 fxdr_swapcookie3(tl); 2569 else 2570 uiop->uio_offset = 2571 fxdr_cookie3(tl); 2572 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2573 } 2574 tl += 2; 2575 2576 /* 2577 * Since the attributes are before the file handle 2578 * (sigh), we must skip over the attributes and then 2579 * come back and get them. 2580 */ 2581 attrflag = fxdr_unsigned(int, *tl); 2582 if (attrflag) { 2583 nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR); 2584 memcpy(&fattr, fp, NFSX_V3FATTR); 2585 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2586 doit = fxdr_unsigned(int, *tl); 2587 if (doit) { 2588 nfsm_getfh(fhp, fhsize, 1); 2589 if (NFS_CMPFH(dnp, fhp, fhsize)) { 2590 VREF(vp); 2591 newvp = vp; 2592 np = dnp; 2593 } else { 2594 error = nfs_nget(vp->v_mount, fhp, 2595 fhsize, &np); 2596 if (!error) 2597 newvp = NFSTOV(np); 2598 } 2599 if (!error) { 2600 const char *cp; 2601 2602 nfs_loadattrcache(&newvp, &fattr, 0, 0); 2603 dp->d_type = 2604 IFTODT(VTTOIF(np->n_vattr->va_type)); 2605 ndp->ni_vp = newvp; 2606 cp = cnp->cn_nameptr + cnp->cn_namelen; 2607 cnp->cn_hash = 2608 namei_hash(cnp->cn_nameptr, &cp); 2609 if (cnp->cn_namelen <= NCHNAMLEN) 2610 cache_enter(ndp->ni_dvp, ndp->ni_vp, 2611 cnp); 2612 } 2613 } 2614 } else { 2615 /* Just skip over the file handle */ 2616 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2617 i = fxdr_unsigned(int, *tl); 2618 nfsm_adv(nfsm_rndup(i)); 2619 } 2620 if (newvp != NULLVP) { 2621 if (newvp == vp) 2622 vrele(newvp); 2623 else 2624 vput(newvp); 2625 newvp = NULLVP; 2626 } 2627 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2628 more_dirs = fxdr_unsigned(int, *tl); 2629 } 2630 /* 2631 * If at end of rpc data, get the eof boolean 2632 */ 2633 if (!more_dirs) { 2634 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 2635 more_dirs = (fxdr_unsigned(int, *tl) == 0); 2636 } 2637 m_freem(mrep); 2638 } 2639 /* 2640 * Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ 2641 * by increasing d_reclen for the last record. 2642 */ 2643 if (blksiz > 0) { 2644 left = NFS_DIRFRAGSIZ - blksiz; 2645 dp->d_reclen += left; 2646 NFS_STASHCOOKIE(dp, uiop->uio_offset); 2647 uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base + 2648 left; 2649 uiop->uio_iov->iov_len -= left; 2650 uiop->uio_resid -= left; 2651 } 2652 2653 /* 2654 * We are now either at the end of the directory or have filled the 2655 * block. 2656 */ 2657 if (bigenough) 2658 dnp->n_direofoffset = uiop->uio_offset; 2659 nfsmout: 2660 if (newvp != NULLVP) { 2661 if(newvp == vp) 2662 vrele(newvp); 2663 else 2664 vput(newvp); 2665 } 2666 return (error); 2667 } 2668 static char hextoasc[] = "0123456789abcdef"; 2669 2670 /* 2671 * Silly rename. To make the NFS filesystem that is stateless look a little 2672 * more like the "ufs" a remove of an active vnode is translated to a rename 2673 * to a funny looking filename that is removed by nfs_inactive on the 2674 * nfsnode. There is the potential for another process on a different client 2675 * to create the same funny name between the nfs_lookitup() fails and the 2676 * nfs_rename() completes, but... 2677 */ 2678 int 2679 nfs_sillyrename(dvp, vp, cnp) 2680 struct vnode *dvp, *vp; 2681 struct componentname *cnp; 2682 { 2683 struct sillyrename *sp; 2684 struct nfsnode *np; 2685 int error; 2686 short pid; 2687 2688 cache_purge(dvp); 2689 np = VTONFS(vp); 2690 #ifndef DIAGNOSTIC 2691 if (vp->v_type == VDIR) 2692 panic("nfs: sillyrename dir"); 2693 #endif 2694 MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), 2695 M_NFSREQ, M_WAITOK); 2696 sp->s_cred = crdup(cnp->cn_cred); 2697 sp->s_dvp = dvp; 2698 VREF(dvp); 2699 2700 /* Fudge together a funny name */ 2701 pid = cnp->cn_proc->p_pid; 2702 memcpy(sp->s_name, ".nfsAxxxx4.4", 13); 2703 sp->s_namlen = 12; 2704 sp->s_name[8] = hextoasc[pid & 0xf]; 2705 sp->s_name[7] = hextoasc[(pid >> 4) & 0xf]; 2706 sp->s_name[6] = hextoasc[(pid >> 8) & 0xf]; 2707 sp->s_name[5] = hextoasc[(pid >> 12) & 0xf]; 2708 2709 /* Try lookitups until we get one that isn't there */ 2710 while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2711 cnp->cn_proc, (struct nfsnode **)0) == 0) { 2712 sp->s_name[4]++; 2713 if (sp->s_name[4] > 'z') { 2714 error = EINVAL; 2715 goto bad; 2716 } 2717 } 2718 error = nfs_renameit(dvp, cnp, sp); 2719 if (error) 2720 goto bad; 2721 error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, 2722 cnp->cn_proc, &np); 2723 np->n_sillyrename = sp; 2724 return (0); 2725 bad: 2726 vrele(sp->s_dvp); 2727 crfree(sp->s_cred); 2728 free((caddr_t)sp, M_NFSREQ); 2729 return (error); 2730 } 2731 2732 /* 2733 * Look up a file name and optionally either update the file handle or 2734 * allocate an nfsnode, depending on the value of npp. 2735 * npp == NULL --> just do the lookup 2736 * *npp == NULL --> allocate a new nfsnode and make sure attributes are 2737 * handled too 2738 * *npp != NULL --> update the file handle in the vnode 2739 */ 2740 int 2741 nfs_lookitup(dvp, name, len, cred, procp, npp) 2742 struct vnode *dvp; 2743 const char *name; 2744 int len; 2745 struct ucred *cred; 2746 struct proc *procp; 2747 struct nfsnode **npp; 2748 { 2749 u_int32_t *tl; 2750 caddr_t cp; 2751 int32_t t1, t2; 2752 struct vnode *newvp = (struct vnode *)0; 2753 struct nfsnode *np, *dnp = VTONFS(dvp); 2754 caddr_t bpos, dpos, cp2; 2755 int error = 0, fhlen, attrflag; 2756 struct mbuf *mreq, *mrep, *md, *mb; 2757 nfsfh_t *nfhp; 2758 const int v3 = NFS_ISV3(dvp); 2759 2760 nfsstats.rpccnt[NFSPROC_LOOKUP]++; 2761 nfsm_reqhead(dnp, NFSPROC_LOOKUP, 2762 NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len)); 2763 nfsm_fhtom(dnp, v3); 2764 nfsm_strtom(name, len, NFS_MAXNAMLEN); 2765 nfsm_request(dnp, NFSPROC_LOOKUP, procp, cred); 2766 if (npp && !error) { 2767 nfsm_getfh(nfhp, fhlen, v3); 2768 if (*npp) { 2769 np = *npp; 2770 if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { 2771 free((caddr_t)np->n_fhp, M_NFSBIGFH); 2772 np->n_fhp = &np->n_fh; 2773 } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) 2774 np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK); 2775 memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen); 2776 np->n_fhsize = fhlen; 2777 newvp = NFSTOV(np); 2778 } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { 2779 VREF(dvp); 2780 newvp = dvp; 2781 } else { 2782 error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); 2783 if (error) { 2784 m_freem(mrep); 2785 return (error); 2786 } 2787 newvp = NFSTOV(np); 2788 } 2789 if (v3) { 2790 nfsm_postop_attr(newvp, attrflag, 0); 2791 if (!attrflag && *npp == NULL) { 2792 m_freem(mrep); 2793 vput(newvp); 2794 return (ENOENT); 2795 } 2796 } else 2797 nfsm_loadattr(newvp, (struct vattr *)0, 0); 2798 } 2799 nfsm_reqdone; 2800 if (npp && *npp == NULL) { 2801 if (error) { 2802 if (newvp) 2803 vput(newvp); 2804 } else 2805 *npp = np; 2806 } 2807 return (error); 2808 } 2809 2810 /* 2811 * Nfs Version 3 commit rpc 2812 */ 2813 int 2814 nfs_commit(vp, offset, cnt, procp) 2815 struct vnode *vp; 2816 off_t offset; 2817 uint32_t cnt; 2818 struct proc *procp; 2819 { 2820 caddr_t cp; 2821 u_int32_t *tl; 2822 int32_t t1, t2; 2823 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 2824 caddr_t bpos, dpos, cp2; 2825 int error = 0, wccflag = NFSV3_WCCRATTR; 2826 struct mbuf *mreq, *mrep, *md, *mb; 2827 struct nfsnode *np; 2828 2829 KASSERT(NFS_ISV3(vp)); 2830 2831 #ifdef NFS_DEBUG_COMMIT 2832 printf("commit %lu - %lu\n", (unsigned long)offset, 2833 (unsigned long)(offset + cnt)); 2834 #endif 2835 2836 simple_lock(&nmp->nm_slock); 2837 if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0) { 2838 simple_unlock(&nmp->nm_slock); 2839 return (0); 2840 } 2841 simple_unlock(&nmp->nm_slock); 2842 nfsstats.rpccnt[NFSPROC_COMMIT]++; 2843 np = VTONFS(vp); 2844 nfsm_reqhead(np, NFSPROC_COMMIT, NFSX_FH(1)); 2845 nfsm_fhtom(np, 1); 2846 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); 2847 txdr_hyper(offset, tl); 2848 tl += 2; 2849 *tl = txdr_unsigned(cnt); 2850 nfsm_request(np, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred); 2851 nfsm_wcc_data(vp, wccflag, 0); 2852 if (!error) { 2853 nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF); 2854 simple_lock(&nmp->nm_slock); 2855 if ((nmp->nm_iflag & NFSMNT_STALEWRITEVERF) || 2856 memcmp(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF)) { 2857 memcpy(nmp->nm_writeverf, tl, NFSX_V3WRITEVERF); 2858 error = NFSERR_STALEWRITEVERF; 2859 nmp->nm_iflag |= NFSMNT_STALEWRITEVERF; 2860 } 2861 simple_unlock(&nmp->nm_slock); 2862 } 2863 nfsm_reqdone; 2864 return (error); 2865 } 2866 2867 /* 2868 * Kludge City.. 2869 * - make nfs_bmap() essentially a no-op that does no translation 2870 * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc 2871 * (Maybe I could use the process's page mapping, but I was concerned that 2872 * Kernel Write might not be enabled and also figured copyout() would do 2873 * a lot more work than memcpy() and also it currently happens in the 2874 * context of the swapper process (2). 2875 */ 2876 int 2877 nfs_bmap(v) 2878 void *v; 2879 { 2880 struct vop_bmap_args /* { 2881 struct vnode *a_vp; 2882 daddr_t a_bn; 2883 struct vnode **a_vpp; 2884 daddr_t *a_bnp; 2885 int *a_runp; 2886 } */ *ap = v; 2887 struct vnode *vp = ap->a_vp; 2888 int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift; 2889 2890 if (ap->a_vpp != NULL) 2891 *ap->a_vpp = vp; 2892 if (ap->a_bnp != NULL) 2893 *ap->a_bnp = ap->a_bn << bshift; 2894 if (ap->a_runp != NULL) 2895 *ap->a_runp = 1024 * 1024; /* XXX */ 2896 return (0); 2897 } 2898 2899 /* 2900 * Strategy routine. 2901 * For async requests when nfsiod(s) are running, queue the request by 2902 * calling nfs_asyncio(), otherwise just all nfs_doio() to do the 2903 * request. 2904 */ 2905 int 2906 nfs_strategy(v) 2907 void *v; 2908 { 2909 struct vop_strategy_args *ap = v; 2910 struct buf *bp = ap->a_bp; 2911 struct proc *p; 2912 int error = 0; 2913 2914 if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC)) 2915 panic("nfs physio/async"); 2916 if (bp->b_flags & B_ASYNC) 2917 p = NULL; 2918 else 2919 p = curproc; /* XXX */ 2920 2921 /* 2922 * If the op is asynchronous and an i/o daemon is waiting 2923 * queue the request, wake it up and wait for completion 2924 * otherwise just do it ourselves. 2925 */ 2926 2927 if ((bp->b_flags & B_ASYNC) == 0 || 2928 nfs_asyncio(bp)) 2929 error = nfs_doio(bp, p); 2930 return (error); 2931 } 2932 2933 /* 2934 * fsync vnode op. Just call nfs_flush() with commit == 1. 2935 */ 2936 /* ARGSUSED */ 2937 int 2938 nfs_fsync(v) 2939 void *v; 2940 { 2941 struct vop_fsync_args /* { 2942 struct vnodeop_desc *a_desc; 2943 struct vnode * a_vp; 2944 struct ucred * a_cred; 2945 int a_flags; 2946 off_t offlo; 2947 off_t offhi; 2948 struct proc * a_p; 2949 } */ *ap = v; 2950 2951 return (nfs_flush(ap->a_vp, ap->a_cred, 2952 (ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1)); 2953 } 2954 2955 /* 2956 * Flush all the data associated with a vnode. 2957 */ 2958 int 2959 nfs_flush(vp, cred, waitfor, p, commit) 2960 struct vnode *vp; 2961 struct ucred *cred; 2962 int waitfor; 2963 struct proc *p; 2964 int commit; 2965 { 2966 struct nfsnode *np = VTONFS(vp); 2967 int error; 2968 int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO; 2969 UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist); 2970 2971 simple_lock(&vp->v_interlock); 2972 error = VOP_PUTPAGES(vp, 0, 0, flushflags); 2973 if (np->n_flag & NWRITEERR) { 2974 error = np->n_error; 2975 np->n_flag &= ~NWRITEERR; 2976 } 2977 UVMHIST_LOG(ubchist, "returning %d", error,0,0,0); 2978 return (error); 2979 } 2980 2981 /* 2982 * Return POSIX pathconf information applicable to nfs. 2983 * 2984 * N.B. The NFS V2 protocol doesn't support this RPC. 2985 */ 2986 /* ARGSUSED */ 2987 int 2988 nfs_pathconf(v) 2989 void *v; 2990 { 2991 struct vop_pathconf_args /* { 2992 struct vnode *a_vp; 2993 int a_name; 2994 register_t *a_retval; 2995 } */ *ap = v; 2996 struct nfsv3_pathconf *pcp; 2997 struct vnode *vp = ap->a_vp; 2998 struct mbuf *mreq, *mrep, *md, *mb; 2999 int32_t t1, t2; 3000 u_int32_t *tl; 3001 caddr_t bpos, dpos, cp, cp2; 3002 int error = 0, attrflag; 3003 #ifndef NFS_V2_ONLY 3004 struct nfsmount *nmp; 3005 unsigned int l; 3006 u_int64_t maxsize; 3007 #endif 3008 const int v3 = NFS_ISV3(vp); 3009 struct nfsnode *np = VTONFS(vp); 3010 3011 switch (ap->a_name) { 3012 /* Names that can be resolved locally. */ 3013 case _PC_PIPE_BUF: 3014 *ap->a_retval = PIPE_BUF; 3015 break; 3016 case _PC_SYNC_IO: 3017 *ap->a_retval = 1; 3018 break; 3019 /* Names that cannot be resolved locally; do an RPC, if possible. */ 3020 case _PC_LINK_MAX: 3021 case _PC_NAME_MAX: 3022 case _PC_CHOWN_RESTRICTED: 3023 case _PC_NO_TRUNC: 3024 if (!v3) { 3025 error = EINVAL; 3026 break; 3027 } 3028 nfsstats.rpccnt[NFSPROC_PATHCONF]++; 3029 nfsm_reqhead(np, NFSPROC_PATHCONF, NFSX_FH(1)); 3030 nfsm_fhtom(np, 1); 3031 nfsm_request(np, NFSPROC_PATHCONF, 3032 curproc, curproc->p_ucred); /* XXX */ 3033 nfsm_postop_attr(vp, attrflag, 0); 3034 if (!error) { 3035 nfsm_dissect(pcp, struct nfsv3_pathconf *, 3036 NFSX_V3PATHCONF); 3037 switch (ap->a_name) { 3038 case _PC_LINK_MAX: 3039 *ap->a_retval = 3040 fxdr_unsigned(register_t, pcp->pc_linkmax); 3041 break; 3042 case _PC_NAME_MAX: 3043 *ap->a_retval = 3044 fxdr_unsigned(register_t, pcp->pc_namemax); 3045 break; 3046 case _PC_CHOWN_RESTRICTED: 3047 *ap->a_retval = 3048 (pcp->pc_chownrestricted == nfs_true); 3049 break; 3050 case _PC_NO_TRUNC: 3051 *ap->a_retval = 3052 (pcp->pc_notrunc == nfs_true); 3053 break; 3054 } 3055 } 3056 nfsm_reqdone; 3057 break; 3058 case _PC_FILESIZEBITS: 3059 #ifndef NFS_V2_ONLY 3060 if (v3) { 3061 nmp = VFSTONFS(vp->v_mount); 3062 if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0) 3063 if ((error = nfs_fsinfo(nmp, vp, 3064 curproc->p_ucred, curproc)) != 0) /* XXX */ 3065 break; 3066 for (l = 0, maxsize = nmp->nm_maxfilesize; 3067 (maxsize >> l) > 0; l++) 3068 ; 3069 *ap->a_retval = l + 1; 3070 } else 3071 #endif 3072 { 3073 *ap->a_retval = 32; /* NFS V2 limitation */ 3074 } 3075 break; 3076 default: 3077 error = EINVAL; 3078 break; 3079 } 3080 3081 return (error); 3082 } 3083 3084 /* 3085 * NFS advisory byte-level locks. 3086 */ 3087 int 3088 nfs_advlock(v) 3089 void *v; 3090 { 3091 struct vop_advlock_args /* { 3092 struct vnode *a_vp; 3093 caddr_t a_id; 3094 int a_op; 3095 struct flock *a_fl; 3096 int a_flags; 3097 } */ *ap = v; 3098 struct nfsnode *np = VTONFS(ap->a_vp); 3099 3100 return lf_advlock(ap, &np->n_lockf, np->n_size); 3101 } 3102 3103 /* 3104 * Print out the contents of an nfsnode. 3105 */ 3106 int 3107 nfs_print(v) 3108 void *v; 3109 { 3110 struct vop_print_args /* { 3111 struct vnode *a_vp; 3112 } */ *ap = v; 3113 struct vnode *vp = ap->a_vp; 3114 struct nfsnode *np = VTONFS(vp); 3115 3116 printf("tag VT_NFS, fileid %ld fsid 0x%lx", 3117 np->n_vattr->va_fileid, np->n_vattr->va_fsid); 3118 if (vp->v_type == VFIFO) 3119 fifo_printinfo(vp); 3120 printf("\n"); 3121 return (0); 3122 } 3123 3124 /* 3125 * NFS file truncation. 3126 */ 3127 int 3128 nfs_truncate(v) 3129 void *v; 3130 { 3131 #if 0 3132 struct vop_truncate_args /* { 3133 struct vnode *a_vp; 3134 off_t a_length; 3135 int a_flags; 3136 struct ucred *a_cred; 3137 struct proc *a_p; 3138 } */ *ap = v; 3139 #endif 3140 3141 /* Use nfs_setattr */ 3142 return (EOPNOTSUPP); 3143 } 3144 3145 /* 3146 * NFS update. 3147 */ 3148 int 3149 nfs_update(v) 3150 void *v; 3151 #if 0 3152 struct vop_update_args /* { 3153 struct vnode *a_vp; 3154 struct timespec *a_ta; 3155 struct timespec *a_tm; 3156 int a_waitfor; 3157 } */ *ap = v; 3158 #endif 3159 { 3160 3161 /* Use nfs_setattr */ 3162 return (EOPNOTSUPP); 3163 } 3164 3165 /* 3166 * Just call bwrite(). 3167 */ 3168 int 3169 nfs_bwrite(v) 3170 void *v; 3171 { 3172 struct vop_bwrite_args /* { 3173 struct vnode *a_bp; 3174 } */ *ap = v; 3175 3176 return (bwrite(ap->a_bp)); 3177 } 3178 3179 /* 3180 * nfs unlock wrapper. 3181 */ 3182 int 3183 nfs_unlock(void *v) 3184 { 3185 struct vop_unlock_args /* { 3186 struct vnode *a_vp; 3187 int a_flags; 3188 } */ *ap = v; 3189 struct vnode *vp = ap->a_vp; 3190 3191 /* 3192 * VOP_UNLOCK can be called by nfs_loadattrcache 3193 * with v_data == 0. 3194 */ 3195 if (VTONFS(vp)) { 3196 nfs_delayedtruncate(vp); 3197 } 3198 3199 return genfs_unlock(v); 3200 } 3201 3202 /* 3203 * nfs special file access vnode op. 3204 * Essentially just get vattr and then imitate iaccess() since the device is 3205 * local to the client. 3206 */ 3207 int 3208 nfsspec_access(v) 3209 void *v; 3210 { 3211 struct vop_access_args /* { 3212 struct vnode *a_vp; 3213 int a_mode; 3214 struct ucred *a_cred; 3215 struct proc *a_p; 3216 } */ *ap = v; 3217 struct vattr va; 3218 struct vnode *vp = ap->a_vp; 3219 int error; 3220 3221 error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p); 3222 if (error) 3223 return (error); 3224 3225 /* 3226 * Disallow write attempts on filesystems mounted read-only; 3227 * unless the file is a socket, fifo, or a block or character 3228 * device resident on the filesystem. 3229 */ 3230 if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { 3231 switch (vp->v_type) { 3232 case VREG: 3233 case VDIR: 3234 case VLNK: 3235 return (EROFS); 3236 default: 3237 break; 3238 } 3239 } 3240 3241 return (vaccess(va.va_type, va.va_mode, 3242 va.va_uid, va.va_gid, ap->a_mode, ap->a_cred)); 3243 } 3244 3245 /* 3246 * Read wrapper for special devices. 3247 */ 3248 int 3249 nfsspec_read(v) 3250 void *v; 3251 { 3252 struct vop_read_args /* { 3253 struct vnode *a_vp; 3254 struct uio *a_uio; 3255 int a_ioflag; 3256 struct ucred *a_cred; 3257 } */ *ap = v; 3258 struct nfsnode *np = VTONFS(ap->a_vp); 3259 3260 /* 3261 * Set access flag. 3262 */ 3263 np->n_flag |= NACC; 3264 np->n_atim.tv_sec = time.tv_sec; 3265 np->n_atim.tv_nsec = time.tv_usec * 1000; 3266 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap)); 3267 } 3268 3269 /* 3270 * Write wrapper for special devices. 3271 */ 3272 int 3273 nfsspec_write(v) 3274 void *v; 3275 { 3276 struct vop_write_args /* { 3277 struct vnode *a_vp; 3278 struct uio *a_uio; 3279 int a_ioflag; 3280 struct ucred *a_cred; 3281 } */ *ap = v; 3282 struct nfsnode *np = VTONFS(ap->a_vp); 3283 3284 /* 3285 * Set update flag. 3286 */ 3287 np->n_flag |= NUPD; 3288 np->n_mtim.tv_sec = time.tv_sec; 3289 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3290 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap)); 3291 } 3292 3293 /* 3294 * Close wrapper for special devices. 3295 * 3296 * Update the times on the nfsnode then do device close. 3297 */ 3298 int 3299 nfsspec_close(v) 3300 void *v; 3301 { 3302 struct vop_close_args /* { 3303 struct vnode *a_vp; 3304 int a_fflag; 3305 struct ucred *a_cred; 3306 struct proc *a_p; 3307 } */ *ap = v; 3308 struct vnode *vp = ap->a_vp; 3309 struct nfsnode *np = VTONFS(vp); 3310 struct vattr vattr; 3311 3312 if (np->n_flag & (NACC | NUPD)) { 3313 np->n_flag |= NCHG; 3314 if (vp->v_usecount == 1 && 3315 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3316 VATTR_NULL(&vattr); 3317 if (np->n_flag & NACC) 3318 vattr.va_atime = np->n_atim; 3319 if (np->n_flag & NUPD) 3320 vattr.va_mtime = np->n_mtim; 3321 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3322 } 3323 } 3324 return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap)); 3325 } 3326 3327 /* 3328 * Read wrapper for fifos. 3329 */ 3330 int 3331 nfsfifo_read(v) 3332 void *v; 3333 { 3334 struct vop_read_args /* { 3335 struct vnode *a_vp; 3336 struct uio *a_uio; 3337 int a_ioflag; 3338 struct ucred *a_cred; 3339 } */ *ap = v; 3340 struct nfsnode *np = VTONFS(ap->a_vp); 3341 3342 /* 3343 * Set access flag. 3344 */ 3345 np->n_flag |= NACC; 3346 np->n_atim.tv_sec = time.tv_sec; 3347 np->n_atim.tv_nsec = time.tv_usec * 1000; 3348 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap)); 3349 } 3350 3351 /* 3352 * Write wrapper for fifos. 3353 */ 3354 int 3355 nfsfifo_write(v) 3356 void *v; 3357 { 3358 struct vop_write_args /* { 3359 struct vnode *a_vp; 3360 struct uio *a_uio; 3361 int a_ioflag; 3362 struct ucred *a_cred; 3363 } */ *ap = v; 3364 struct nfsnode *np = VTONFS(ap->a_vp); 3365 3366 /* 3367 * Set update flag. 3368 */ 3369 np->n_flag |= NUPD; 3370 np->n_mtim.tv_sec = time.tv_sec; 3371 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3372 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap)); 3373 } 3374 3375 /* 3376 * Close wrapper for fifos. 3377 * 3378 * Update the times on the nfsnode then do fifo close. 3379 */ 3380 int 3381 nfsfifo_close(v) 3382 void *v; 3383 { 3384 struct vop_close_args /* { 3385 struct vnode *a_vp; 3386 int a_fflag; 3387 struct ucred *a_cred; 3388 struct proc *a_p; 3389 } */ *ap = v; 3390 struct vnode *vp = ap->a_vp; 3391 struct nfsnode *np = VTONFS(vp); 3392 struct vattr vattr; 3393 3394 if (np->n_flag & (NACC | NUPD)) { 3395 if (np->n_flag & NACC) { 3396 np->n_atim.tv_sec = time.tv_sec; 3397 np->n_atim.tv_nsec = time.tv_usec * 1000; 3398 } 3399 if (np->n_flag & NUPD) { 3400 np->n_mtim.tv_sec = time.tv_sec; 3401 np->n_mtim.tv_nsec = time.tv_usec * 1000; 3402 } 3403 np->n_flag |= NCHG; 3404 if (vp->v_usecount == 1 && 3405 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) { 3406 VATTR_NULL(&vattr); 3407 if (np->n_flag & NACC) 3408 vattr.va_atime = np->n_atim; 3409 if (np->n_flag & NUPD) 3410 vattr.va_mtime = np->n_mtim; 3411 (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p); 3412 } 3413 } 3414 return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap)); 3415 } 3416
Indexes created Tue Oct 14 15:09:51 GMT 2025